Malicious PDF — malware analysis report

Heuristics 6

• 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.
• Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
  PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
• Urgency / deadline lure low SE_URGENCY_LURE
  Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
• External URI info PDF_URI
  PDF contains an external URL action
• Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
  The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
• 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 https://traffset.ru/aws?keyword=dry+curd+cottage+cheese PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4366319/normal_5f9c85072cbb0.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://uploads.strikinglycdn.com/files/1326499b-0340-4b37-9b29-43797813fc92/80685306584.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/cd1bb71c-e121-4a95-91d2-a59e69a86b58/sulorumoro.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/6a8b8740-73ea-4e05-9f10-6ce0df2835e4/15740241218.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/2c65e2cd-48f9-4c3d-abe6-7e16e038c885/nolokojijibidurupaxup.pdfIn PDF document text
  • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.pdfIn PDF document text
  • https://s3.amazonaws.com/posufij/taiga_biome_abiotic_and_biotic_factors.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/f1dd429c-9cb3-4037-a3b2-a4aadf476f7e/probability_word_problems_worksheets_5th_grade.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/bbda1b21-fdb0-4276-9d11-a8c75171cbdc/pibojominuwapaza.pdfIn PDF document text
  • https://s3.amazonaws.com/mefadedosuw/zujanaxabuxukatar.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/cbdc8d00-4f10-4ba5-b339-40e8f6ba24c5/suparixejisukivadi.pdfIn PDF document text
  • https://fewelegur.files.wordpress.com/2020/11/rokukifat.pdfIn 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/pdf/1.3/In PDF document text
  • http://ns.adobe.com/xap/1.0/In PDF document text
  • http://ns.adobe.com/xap/1.0/mm/In PDF document text
  • http://ns.adobe.com/xap/1.0/rights/In PDF document text
  • http://scripts.sil.org/OFLIn PDF document text

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