What is this Style script with porn links on bottom of my website?

Question

Hi I have a site built with latest ruby on rails 7.0.4 and ruby 3.2.0 with some https://www.getpapercss.com/ and cloudflair and digitalocean component library and this morning I see in bottom of site source this line:

 <style>a[href^="http://intent.bingads.com/"],a[href^="https://thaudray.com/"],a[href^="https://aj1070.online/"],[data-m-ad-id],a[href^="https://awecrptjmp.com/"],a[href^="https://www.iyalc.com/"],a[data-url^="http://paid.outbrain.com/network/redir?"],a[href^="https://go.nordvpn.net/aff"] > img,a[href^="https://deliver.tf2www.com/"],a[href^="https://join.virtualtaboo.com/track/"],a[href^="https://track.totalav.com/"],a[href^="https://www.sweetdeals.com"],a[href^="https://ads.planetwin365affiliate.com/redirect.aspx?"],a[href^="http://enter.anabolic.com/track/"],a[href^="https://camfapr.com/landing/click/"],a[data-redirect^="http://paid.outbrain.com/network/redir?"],a[href^="https://a-ads.com/"],div[id^="dfp-ad-"],a[href="//rufflycouncil.com/"],app-advertisement,a[data-widget-outbrain-redirect^="http://paid.outbrain.com/network/redir?"],a[href^="http://affiliates.thrixxx.com/"],div[data-role="sidebarAd"],a[href^="http://https://www.get-express-vpn.com/offer/"],a[href^="https://ismlks.com/"],a[href^="https://axdsz.pro/"],div[id^="div-ads-"],a[href^="https://cagothie.net/"],a[href^="https://uncensored.game/"],[href^="https://go.astutelinks.com/"],a[href^="https://trf.bannerator.com/"],[href^="https://cpa.10kfreesilver.com/"],a[href^="https://claring-loccelkin.com/"],[href^="https://go.4rabettraff.com/"],a[href^="http://www.adultdvdempire.com/?partner_id="][href*="&utm_"],a[href^="https://syndication.optimizesrv.com/"],a[href^="https://syndication.dynsrvtbg.com/"],app-ad,a[href^="//agacelebir.com/"],[data-adblockkey],a[href^="https://go.goasrv.com/"],div[data-native_ad],a[href^="http://cam4com.go2cloud.org/aff_c?"],[href^="http://join.michelle-austin.com/"],a[href^="https://prf.hn/click/"][href*="/creativeref:"] > img,a[href^="https://www.adsexse.com/x/"],div[data-dfp-id],a[href^="https://bs.serving-sys.com"],div[id^="adfox_"],a[href^="https://tour.mrskin.com/"],[href^="https://noqreport.com/"] > img,a[href^="https://frameworkdeserve.com/"],div[id^="taboola-stream-"],[href="https://ourgoldguy.com/contact/"] img,a[href^="https://www.privateinternetaccess.com/"] > img,div[id^="advads_"],[class^="div-gpt-ad"],a[href^="https://a.montangop.top/"],a[href^="https://black77854.com/"],a[href^="https://track.adform.net/"],[href^="https://antiagingbed.com/discount/"] > img,[href^="https://clk.right-wing-health.com/"],a[href^="https://www.sheetmusicplus.com/?aff_id="],a[href^="//apptjmp.com/"],a[href^="https://misspkl.com/"],a[href^="https://transfer.xe.com/signup/track/redirect?"],[data-ez-name],a[href^="https://takeallsoft.ru/"],div[id^="ad_rect_"],[data-name="adaptiveConstructorAd"],div[id^="advads-"],[href^="https://mystore.com/"] > img,a[href^="https://www.goldenfrog.com/vyprvpn?offer_id="][href*="&aff_id="],a[href^="https://click.linksynergy.com/fs-bin/"],a[href^="https://static.fleshlight.com/images/banners/"],a[href^="https://join.sexworld3d.com/track/"],a[href^="http://go.fpmarkets.com/"],a[href^="https://partners.fxoro.com/click.php?"],a[href^="https://go.goaserv.com/"],a[href^="https://pongidsrunback.com/"],div[data-insertion],a[href^="https://adnetwrk.com/"],a[href^="https://affiliate.rusvpn.com/click.php?"],a[href^="https://engine.trackingdesks.com/"],[href^="https://go.affiliatexe.com/"],[data-advadstrackid],a[href^="https://track.afcpatrk.com/"],a[href^="https://go.cmtaffiliates.com/"],[href^="http://www.mypillow.com/"] > img,a[href^="https://bongacams10.com/track?"],a[href^="https://clickadilla.com/"],a[href^="https://albionsoftwares.com/"],AD-TRIPLE-BOX,a[href^="https://www.sugarinstant.com/?partner_id="],a[href^="https://refpazkjixes.top/"],a[href^="https://gohere.pl/"],a[href^="https://chaturbate.com/in/?tour="],a[href^="https://ads-for-free.com/click.php?"],a[href^="http://www.adultempire.com/unlimited/promo?"][href*="&partner_id="],[id^="chp_ads_block"],a[data-redirect^="https://paid.outbrain.com/network/redir?"],[href^="https://mylead.global/stl/"] > img,a[href^="http://www.mrskin.com/tour"],a[href^="https://nutrientassumptionclaims.com/"],div[id^="ads300_100-widget-"],ADS-RIGHT,[href^="https://cipledecline.buzz/"],a[href^="https://msecure117.com/"],a[href^="https://ads.cdn.live/"],a[href^="//lambingsyddir.com/"],a[href^="https://webroutetrk.com/"],a[href^="https://t.adating.link/"],a[href^="https://lobimax.com/"],a[href^="https://land.brazzersnetwork.com/landing/"],a[href^="https://awptjmp.com/"],a[href^="https://go.strpjmp.com/"],a[href^="https://www.purevpn.com/"][href*="&utm_source=aff-"],a[href^="https://a.bestcontentoperation.top/"],[data-ad-manager-id],a[href^="https://www.camsoda.com/enter.php?id="],AMP-AD,div[id^="adspot-"],a[href^="http://d2.zedo.com/"],a[href^="http://www.gfrevenge.com/landing/"],topadblock,[data-revive-zoneid],a[href^="https://chaturbate.jjgirls.com/?track="],[href^="https://www.reimageplus.com/"],a[href^="https://odnxe.lncredlbiedate.com/"],a[href^="https://click.dtiserv2.com/"],[href^="https://join.playboyplus.com/track/"],a[href^="http://bc.vc/?r="],a[href^="https://track.interactivegf.com/"],a[href^="https://www.infowarsstore.com/"] > img,[data-dynamic-ads],a[onmousedown^="this.href='https://paid.outbrain.com/network/redir?"][target="_blank"] + .ob_source,AD-SLOT,amp-ad-custom,div[id^="gtm-ad-"],[data-d-ad-id],a[data-obtrack^="http://paid.outbrain.com/network/redir?"],[href^="http://www.fleshlightgirls.com/"],a[href^="https://paid.outbrain.com/network/redir?"],a[href^="https://s.zlink2.com/"],[href^="https://ilovemyfreedoms.com/landing-"],a[href^="https://ovb.im/"],a[href^="http://affiliate.glbtracker.com/"],a[href^="https://mediaserver.gvcaffiliates.com/renderBanner.do?"],iframe[src^="http://www.adpeepshosted.com/"],div[data-mpu1],a[href^="https://pl.premium4kflix.website/"],a[href^="https://speedsupermarketdonut.com/"],a[href*="http://MyPillow.com"] > img,[href^="https://zstacklife.com/"] img,iframe[src^="https://pagead2.googlesyndication.com/"],a[href^="https://www.awin1.com/cread.php?awinaffid="],a[href^="https://prf.hn/click/"][href*="/adref:"] > img,a[href^="https://incisivetrk.cvtr.io/click?"],a[href^="https://www.healthrangerstore.com/"] > img,a[href^="https://www.kingsoffetish.com/tour?partner_id="],a[href^="https://mmwebhandler.aff-online.com/"],a[href^="https://trusted-click-host.com/"],[href^="https://mypatriotsupply.com/"] > img,a[href^="https://track.clickmoi.xyz/"],a[href^="https://traffdaq.com/"],a[href^="http://adultgames.xxx/"],a[href^="https://lnkxt.bannerator.com/"],a[href^="https://someperceptionparade.com/"],guj-ad,a[href^="https://offers.refchamp.com/"],[href^="https://www.restoro.com/"],a[href^="https://go.hpyrdr.com/"],a[href^="https://landing.brazzersnetwork.com/"],a[href^="https://bngpt.com/"],a[href^="https://tracking.gitads.io/"],a[href^="https://reinstandpointdumbest.com/"],div[id^="gpt_ad_"],[href^="https://track.fiverr.com/visit/"] > img,[href^="https://routewebtk.com/"],a[href^="https://deliver.ptgncdn.com/"],a[href^="https://syndication.exoclick.com/"],a[href^="https://dfsdkkka.com/"],[href^="https://go.xlrdr.com"],div[id^="ad-server-"],a[href^="http://go.xtbaffiliates.com/"],div[id^="ad-inserter-"],a[href^="https://track.themadtrcker.com/"],[class^="s2nPlayer"],a[href^="https://mediaserver.entainpartners.com/renderBanner.do?"],a[href^="https://oackoubs.com/"],a[href^="https://m.do.co/c/"] > img,a[href^="http://paid.outbrain.com/network/redir?"],[href^="http://go.cm-trk2.com/"],a[href^="https://go.247traffic.com/"],a[href^="https://go.tmrjmp.com"],[id^="ad-wrap-"],a[data-oburl^="https://paid.outbrain.com/network/redir?"],[href="https://www.masstortfinancing.com/"] > img,a[href^="https://s.zlink1.com/"],a[href^="https://www.adultempire.com/"][href*="?partner_id="],a[href^="https://1free33style.com/"],a[href^="https://movie.download-file.org/"],a[href^="https://pcm.bannerator.com/"],a[href^="https://dooloust.net/"],a[href^="https://trappist-1d.com/"],a[href^="//chrif8kdstie.com/"],a[href^="https://natour.naughtyamerica.com/track/"],[href^="https://www.mypatriotsupply.com/"] > img,a[href^="https://pb-track.com/"],a[href^="https://track.bruceads.com/"],amp-fx-flying-carpet,a[href^="https://www.clicktraceclick.com/"],a[href^="https://reachtrgt.com/"],a[href^="https://www.sheetmusicplus.com/"][href*="?aff_id="],a[href^="//syndication.dynsrvtbg.com/"],a[href^="https://porngames.adult/?SID="],a[href^="http://allaptair.club/"],div.fadeInDown[id$="____equal"][class$="____equal"],[href^="https://engine.gettopple.com/"],a[href^="https://adjoincomprise.com/"],a[href^="https://www.profitablecpmgate.com/"],a[href^="//go.eabids.com/"],div[id^="ads250_250-widget-"],a[href^="https://www.jackery.com?aff="] > img,[href^="https://glersakr.com/"],a[href^="http://pubads.g.doubleclick.net/"],a[href^="https://clicks.pipaffiliates.com/"],div[id^="ad_position_"],a[href^="https://affcpatrk.com/"],a[href^="https://as.sexad.net/"],div[id^="_vdo_ads_player_ai_"],a[href^="https://moneynow.one/"],a[href^="https://refpa4903566.top/"],a[href^="https://playuhd.host/"],a[href^="https://go.xlviiirdr.com"],a[href^="https://meet-to-fuck.com/"],[href^="http://homemoviestube.com/"],a[href^="https://go.xlviirdr.com"],[href^="https://kingered-banctours.com/"],a[href^="https://bestcond1tions.com/"],a[href^="https://fastestvpn.com/lifetime-special-deal?a_aid="],a[href^="https://go.xlvirdr.com"],a[href^="https://go.trackitalltheway.com/"],div[data-id-advertdfpconf],a[href^="https://go.xxxiijmp.com"],[class^="amp-ad-"],[onclick^="location.href='http://www.reimageplus.com"],a[href^="https://streamate.com/landing/click/"],[href^="https://zone.gotrackier.com/"],[href^="https://infinitytrk.com/"],a[href^="https://iqbroker.com/"][href*="?aff="],a[href^="https://go.julrdr.com/"],a[href^="https://adsrv4k.com/"],a[href^="http://www.onclickmega.com/jump/next.php?"],a[href^="https://clixtrac.com/"],a[href*=".zlinkm.com/"],[href^="http://join.shemale.xxx/"],a-ad,a[href^="https://www.brazzersnetwork.com/landing/"],a[href^="https://aff-ads.stickywilds.com/"],[data-css-class="dfp-inarticle"],iframe[src^="http://ad.yieldmanager.com/"],[data-mobile-ad-id],a[href^="https://tracking.trackcasino.co/"],div[id*="ScriptRoot"],a[href^="https://waisheph.com/"],[href^="https://shrugartisticelder.com"],[data-role="tile-ads-module"],a[href^="https://chaturbate.com/in/?track="],div[data-ad-placeholder],a[href^="https://track.healthtrader.com/"],a[href^="https://medleyads.com/"],div[data-adzone],a[href^="http://www.coiwqe.site/"],div[id^="zergnet-widget"],img[src^="https://images.purevpnaffiliates.com"],[href^="https://www.brighteonstore.com/products/"] img,a[href*="//lkstrck2.com/"],a[href^="https://www.arthrozene.com/"][href*="?tid="],[href^="https://join.girlsoutwest.com/"],a[href^="https://thechleads.pro/"],[href^="https://www.hostg.xyz/"] > img,a[href^="https://twinrdsyn.com/"],a[href^="https://iactrivago.ampxdirect.com/"],[href^="http://clicks.totemcash.com/"],a[href^="https://tracking.comfortclick.eu/"],[href^="https://join3.bannedsextapes.com"],a[href*=".trust.zone"],a[href^="https://www.highperformancecpmgate.com/"],a[href^="https://queersodadults.com/"],[href^="https://click2cvs.com/"],[data-ad-module],a[href^="https://adclick.g.doubleclick.net/"],[href^="https://rapidgator.net/article/premium/ref/"],a[href^="https://tupitea.co/"],a[href^="https://wittered-mainging.com/"],a[href^="https://delivery.porn.com/"],a[href^="//wagerprocuratorantiterrorist.com/"],a[href^="https://k2s.cc/pr/"],[href^="https://www.mypillow.com/"] > img,a[href^="https://dianches-inchor.com/"],a[href^="https://iac.ampxdirect.com/"],a[href^="https://serve.awmdelivery.com/"],div[class^="Adstyled__AdWrapper-"],[href^="http://www.pingperfect.com/aff.php"],[href^="http://globsads.com/"],a[href^="https://a.bestcontentfood.top/"],div[class^="kiwi-ad-wrapper"],div[data-native-ad],a[href^="https://www.rabbits.webcam/?id="],div[data-adunit],a[href^="http://googleads.g.doubleclick.net/pcs/click"],a[href^="https://bestdatinghere.life/"],[id^="google_ads_iframe"],a[href^="http://tc.tradetracker.net/"] > img,a[href^="https://financeads.net/tc.php?"],div[id^="ads300_250-widget-"],bottomadblock,[href^="https://www.cloudways.com/en/?id"],a[href^="https://avtub.click/assets/link.php"],div[class^="gpt-ad-hor"],a[href^="https://landing1.brazzersnetwork.com"],a[href^="https://vlnk.me/"],a[href^="https://bluedelivery.pro/"],a[href^="https://www.vfreecams.com/in/?track="],div[jsdata*="CarouselPLA-"][data-id^="CarouselPLA-"],a[onmousedown^="this.href='http://paid.outbrain.com/network/redir?"][target="_blank"],a[onmousedown^="this.href='https://paid.outbrain.com/network/redir?"][target="_blank"],a[href^="https://tm-offers.gamingadult.com/"],[href^="https://shiftnetwork.infusionsoft.com/go/"] > img,[href^="https://v.investologic.co.uk/"],a[href^="http://partners.etoro.com/"],a[href^="https://www.oboom.com/ref/"],div[data-alias="300x250 Ad 1"],article.ad,a[href^="http://wct.link/"],a[data-url^="http://paid.outbrain.com/network/redir?"] + .author,div[data-ad-wrapper],[href^="https://totlnkcl.com/"],[href^="http://join.shemalesfromhell.com/"],a[href^="https://earandmarketing.com/"],div[id^="vuukle-ad-"],span[id^="ezoic-pub-ad-placeholder-"],a[href^="https://ads.leovegas.com/redirect.aspx?"],a[href^="https://prf.hn/click/"][href*="/camref:"] > img,a[href^="https://meet-sexhere.com/"],[class^="chp_ads_block"],[href^="https://www.targetingpartner.com/"],a[href^="https://aaucwbe.com/"],a[href^="https://taghaugh.com/"],div[data-alias="300x250 Ad 2"],a[href^="https://click.hoolig.app/"],div[id^="ezoic-pub-ad-"],a[href^="https://www.get-express-vpn.com/offer/"],a[href^="https://fakelay.com/"],a[href^="https://ad.zanox.com/ppc/"] > img,a[href^="https://www.bet365.com/"][href*="affiliate="],a[href^="https://uncensored3d.com/"],a[href^="https://www.financeads.net/tc.php?"],div[data-adunit-path],a[href^="https://join.virtuallust3d.com/"],a[href^="https://maymooth-stopic.com/"],a[href^="https://www.bang.com/?aff="],a[href^="https://a.bestcontentweb.top/"],a[href^="https://dialling-abutory.com/"],a[href^="https://americafirstpolls.com/"],[href^="https://www.avantlink.com/click.php"] img,a[href^="http://rs-stripe.wsj.com/stripe/redirect"],display-ad-component,a[href^="https://www.chngtrack.com/"],a[href*=".engine.adglare.net/"],a[href^="https://get.surfshark.net/aff_c?"][href*="&aff_id="] > img,div[id^="google_dfp_"],a[href^="http://ad.doubleclick.net/"],a[href^="https://loboclick.com"],div[id^="gpt-ad-hor"],div[id^="ad-div-"],a[href^="https://fast-redirecting.com/"],a[href^="https://t.aslnk.link/"],a[href^="https://fertilitycommand.com/"],[href^="https://istlnkcl.com/"],a[href^="https://www.liquidfire.mobi/"],[href^="http://join.hardcoreshemalevideo.com/"],a[href^="http://adf.ly/?id="],a[href^="//coarsewary.com/"],div[id^="lazyad-"],a[href^="https://go.xtbaffiliates.com/"],a[href^="http://www.advcashpro.com/aff/"],a[onmousedown^="this.href='http://paid.outbrain.com/network/redir?"][target="_blank"] + .ob_source,a[href^="https://dishphysics.com/"],div[id^="adrotate_widgets-"],a[href^="https://go.skinstrip.net"][href*="?campaignId="],a[href^="https://go.xxxjmp.com"],[href^="http://trafficare.net/"],a[href^="https://see.kmisln.com/"],[href^="https://awbbjmp.com/"],div[id^="crt-"][style],a[href^="https://engine.phn.doublepimp.com/"],zeus-ad,a[href^="https://my-movie.club/"],a[href^="https://promo-bc.com/"],a[href^="https://burpee.xyz/"],div[id^="js-dfp-"],a[href^="http://adultfriendfinder.com/go/page/landing"],a[data-oburl^="http://paid.outbrain.com/network/redir?"],DFP-AD,div[class^="Display_displayAd"],div[aria-label="Ads"],a[href^="https://go.xxxijmp.com"],a[href^="https://go.currency.com/"],a[href^="https://traffic.bannerator.com/"],a[href^="https://gghf.mobi/"],a[href^="http://adserver.adreactor.com/"],a[href^="https://losingoldfry.com/"],a[href^="https://funkydaters.com/"],[href^="http://misslinkvocation.com/"],a[href*="https://www.sweetdeals.com/"] img,a[href^="https://www.mrskin.com/tour"],a[href^="https://go.dmzjmp.com"],div[id^="yandex_ad"],[href^="https://wct.link/"],a[href^="http://www.FriendlyDuck.com/"],a[href^="https://mk-cdn.net/"],a[href^="https://googleads.g.doubleclick.net/pcs/click"],a[href^="https://as.conjectwatson.com/"],a[href^="http://hotcandyland.com/partner/"],[href="https://masstortfinancing.com"] img,a[href^="https://www.mrskin.com/account/"],a[target="_blank"][onmousedown="this.href^='http://paid.outbrain.com/network/redir?"],a[data-redirect^="this.href='http://paid.outbrain.com/network/redir?"],a[href^="https://myusenet.xyz/"],[href^="http://residenceseeingstanding.com/"],a[href^="https://ads.betfair.com/redirect.aspx?"],a[href^="https://billing.purevpn.com/aff.php"] > img,a[href^="https://landing.brazzersplus.com/"],a[href^="https://geniusdexchange.com/"],[href^="http://mypillow.com/"] > 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Answer 1

This was happening to me too (Mac/Chrome). After some research, this is related to the "Threat Protection" feature of NordVPN. If you turn Threat Protection off, the injected code will disappear. Their reasoning is that this hides links and ads from sites Nord has deemed infected or dangerous. Another poster says this is to add links and then hide them, but I have not been able to find any evidence of links being added, just the style injection.

If you don't want that functionality, you can turn off the Threat Protection. You can find more info about the feature here: https://nordvpn.com/features/threat-protection/