Malicious PDF — malware analysis report

Heuristics 9

• Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
  Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
• Cracked-software lure uses shortlink/download gateway critical PDF_CRACKED_SOFTWARE_SHORTLINK_LURE
  PDF visible text advertises a crack, serial number, archive, or pirated-software download and pairs it with a shortlink or encoded download gateway. This is a high-confidence social-engineering carrier for unwanted software or droppers; the PDF itself is not a parser exploit.
• PDF links to document on public blob storage high PDF_PUBLIC_BLOB_DOCUMENT_LINK
  PDF contains a clickable action to a document payload hosted on public blob/object storage. Shared object storage can be used legitimately, so this rule is suspicious rather than conclusive unless paired with lure text or other phishing indicators.
• Cracked-software lure uses download-gateway redirectors high PDF_CRACKED_SOFTWARE_REDIRECTOR_LINK_FARM
  PDF contains multiple cracked-software/keygen/serial-key lure links together with long encoded download-gateway URLs or known crack-download redirector hosts. This is stronger than generic piracy vocabulary: the document is an SEO lure that funnels users through redirect/download infrastructure commonly used for adware, unwanted software, or droppers.
• PDF links to a cracked-software download doorway (base64-obfuscated) high PDF_CRACKED_SOFTWARE_DOWNLOAD_DOORWAY
  PDF's embedded link hides a pirated-software title as a base64 blob inside the URL path/query (and/or carries the ``download|`` doorway-template marker), rather than in visible text. This is a TCPDF-generated SEO doorway that ranks for software-piracy searches and funnels users to fake 'crack/keygen' download pages distributing adware, potentially-unwanted programs, or droppers. The base64 encoding is deliberate obfuscation to evade plaintext lure rules; the PDF itself carries no parser exploit — the risk is the linked crack-download destination.
• PDF link farm advertises cracked/pirated software medium PDF_CRACKED_SOFTWARE_LURE
  PDF contains many clickable links whose targets use cracked-software, keygen, serial-key, or warez vocabulary. These are SEO-spam lure documents that rank for software-piracy searches and route users to fake 'crack' download pages distributing potentially-unwanted programs, adware, or droppers. The PDF itself carries no exploit — the risk is the linked destinations.
• Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
  Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
• External URI info PDF_URI
  PDF contains an external URL action
• Embedded URL info EMBEDDED_URL
  One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
  URL http://findinform.com/codifier.johnstone/RGVzY2FyZ2FyIEJsdWVzdGFja3MgUGFyYSBQYyBEZSBCYWpvcyBSZWN1cnNvcyBUcmFuc2xhdGlvbgRGV/ladylike/ZG93bmxvYWR8R2M3Y1hoMVpIeDhNVFkyTWpZNE1ETTVNSHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlGQkVSbDA/muddying/bamboozled/ PDF link annotation

  • https://www.debeiaard-utrecht.nl/advert/optitex-11-crack-link/In PDF document text
  • https://www.verenigingvalouwe.nl/advert/wikmail-pro-full-version-download-added-by-request-best/In PDF document text
  • https://elolist.com/wp-content/uploads/2022/09/VersionBackup_Master_5120.pdfIn PDF document text
  • https://lifemyway.online/wp-content/uploads/2022/09/adcdzOS21.pdfIn PDF document text
  • http://www.kiwitravellers2017.com/2022/09/11/top-download-game-trainz-simulator-indonesia/In PDF document text
  • http://www.giffa.ru/who/digivod-3-5-0-build-37606-setup-crack-sh-64-bit-upd/In PDF document text
  • https://koi-rausch.de/wp-content/uploads/reianj.pdfIn PDF document text
  • https://seo-focus.com/ion-pics-2-sd-software-better-download/In PDF document text
  • https://kcmuslims.com/advert/mercedes-sprinter-vito-start-error/In PDF document text
  • http://southfloridafashionacademy.com/2022/09/10/clash-of-clans-mod/In PDF document text
  • http://sagitmymindasset.com/?p=25838In PDF document text
  • https://pieseutilajeagricole.com/wp-content/uploads/2022/09/langabb.pdfIn PDF document text
  • https://shalamonduke.com/wp-content/uploads/2022/09/Serioux_Gamepad_Srxjph2500_Driver.pdfIn PDF document text
  • https://www.zhijapan.com/wp-content/uploads/2022/09/Quran_In_Bangla_Pdf_Free_Download.pdfIn PDF document text
  • https://azizeshop.com/wp-content/uploads/2022/09/XenoSuite_XenoBot_for_Tibia__Cracked_arMa_setup_free.pdfIn PDF document text
  • https://malekrealty.org/download-klucz-instalacyjny-do-gta-san-andreas-crack-work-15-5/In PDF document text
  • https://www.dominionphone.com/windows-7-sp1-aio-9in1-pre-activated-multilanguage-64-bit/In PDF document text
  • https://storage.googleapis.com/shamanic-bucket/2fe18fde-rhyxyly.pdfIn PDF document text
  • https://www.kisugarshop.com/wp-content/uploads/2022/09/nerkafe.pdfIn PDF document text
  • https://azizeshop.com/wp-In PDF document text
  • http://findinform.com/codifier.johnstone/rgvzy2fyz2fyiejsdwvzdgfja3mgugfyysbqyybezsbcywpvcybszwn1cnnvcybucmfuc2xhdglvbgrgv/ladylike/zg93bmxvywr8r2m3y1homvpiedhnvfkytwpzne1ettvnshg4twpvnu1iedhlrtbwsuzkdmntundjbvz6y3lcyldfmu1vbejesuzzeulgqkvsbda/muddying/bamboozled/In PDF document text
  • https://www.verenigingvalouwe.nl/advert/wikmail-pro-full-version-downloadIn PDF document text
  • https://secureservercdn.net/198.71.233.69/5z3.800.myftpupload.com/wp-content/uploads/2022/09/Tri_D_Corpus_REPACK_Crackepub.pdf?time=1662852856In PDF document text
  • http://www.tcpdf.orgIn PDF document text
  • https://secureservercdn.net/198.71.233.69/5z3.800.myftpupload.com/wp-In PDF document text
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
  • http://purl.org/dc/elements/1.1/In PDF document text
  • http://ns.adobe.com/xap/1.0/In PDF document text
  • http://ns.adobe.com/pdf/1.3/In PDF document text
  • http://ns.adobe.com/xap/1.0/mm/In PDF document text
  • http://www.aiim.org/pdfa/ns/extension/In PDF document text
  • http://www.aiim.org/pdfa/ns/schema#In PDF document text
  • http://www.aiim.org/pdfa/ns/property#In PDF document text
  • http://www.aiim.org/pdfa/ns/id/In PDF document text

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