Malicious PDF — malware analysis report

Heuristics 5

• PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
  PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
• 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.
• 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.
• 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://ttraff.club/wix?keyword=mini+unit+reaction+rates+and+equilibrium+worksheet+answers

  • http://dijugu.bgecyclingclub.co.uk/uploads/1/3/1/8/131857090/756980.pdf
  • http://files.boavitnutrition.com/uploads/1/3/1/6/131606563/c52d072d5.pdf
  • http://files.cardinalfoc.com/uploads/1/3/1/8/131856129/xonoka.pdf
  • http://files.sudensuukon.com/uploads/1/3/2/8/132814996/pigipojukiluf.pdf
  • http://www.ascendercorp.com/
  • http://www.ascendercorp.com/typedesigners.html
  • https://4eb3ee09-5a10-42fb-971a-713ac223512f.filesusr.com/ugd/fb41f9_2e3736dfa1ca4f3fa1a09dba14c5fb6b.pdf?index=true
  • https://c7e4e5fe-32c9-4651-875c-689bd80ad6e8.filesusr.com/ugd/8d0191_af67ed023dd847b7bb9c583fbce01329.pdf?index=true
  • https://c8525528-2433-4684-9415-775152f3eaac.filesusr.com/ugd/d43733_0f104b5439e14c35a2af1e959f2bcce4.pdf?index=true
  • https://e8b9e297-8d6a-43bd-97ca-3ba1510d9917.filesusr.com/ugd/8e6e76_5062e0e41c164dce9f923dda8200e9f1.pdf?index=true
  • https://f7106bf9-5d2c-470a-97ce-a280479f6e9d.filesusr.com/ugd/1f6d71_43d016d21a194059b027f0b2128d1358.pdf?index=true
  • https://13e745b3-673a-4159-bb2b-8d2ef6a8f895.filesusr.com/ugd/c88839_5da44ad54e314a629a3ec1ffe52aad79.pdf?index=true
  • https://a0f6abb1-c3bb-431d-88fd-dbe41b4e1d25.filesusr.com/ugd/9d24cb_9a7784507b7944f98714ecbc461fb649.pdf?index=true
  • https://82e21027-02aa-453d-9069-8be16671ffc3.filesusr.com/ugd/96768c_c64ef5c16b4c4b2991222a1cbd576d44.pdf?index=true
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#
  • http://purl.org/dc/elements/1.1/
  • http://ns.adobe.com/pdf/1.3/
  • http://ns.adobe.com/xap/1.0/
  • http://ns.adobe.com/xap/1.0/mm/
  • http://ns.adobe.com/xap/1.0/rights/
  • http://scripts.sil.org/OFL

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