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.link/wix?keyword=thermochemistry+kinetics+and+equilibrium+worksheet+answers

  • http://gepej.yogadiversityinitiative.org/uploads/1/3/1/4/131437261/laroli_pezogijavamu.pdf
  • http://files.debraheschl.com/uploads/1/3/1/8/131856146/bunujozowufibugozas.pdf
  • http://files.mackenzieemievents.com/uploads/1/3/1/4/131452824/7944865.pdf
  • http://www.ascendercorp.com/
  • http://www.ascendercorp.com/typedesigners.html
  • https://2d833857-8e3a-4b20-bade-97552015683f.filesusr.com/ugd/dec231_71255ab120934a39a9b8b29cdd84397d.pdf?index=true
  • https://e8f2a7b6-e0ed-479f-8142-a1dde8e49399.filesusr.com/ugd/e66789_963ae47f69564554a7d611ea0be76830.pdf?index=true
  • https://75df4fc7-6643-467d-aae2-37695fdef034.filesusr.com/ugd/a07927_9a378a8dc191432287872ea1c1bb7d35.pdf?index=true
  • https://6b0b1cac-cb92-4ae8-8253-0d3e8638a57a.filesusr.com/ugd/b222ea_f757e28e0bac4a699075beebe145c15d.pdf?index=true
  • https://6fdd27f7-264a-4a58-8ef0-64346ee1ecef.filesusr.com/ugd/e4d7df_62541b23a9bb4933b5c2fba2fcad9162.pdf?index=true
  • https://114c9eb7-098b-43b8-8db9-e8bf717d2e90.filesusr.com/ugd/9219f8_3077b866be3b434893e47679a6b7fcfd.pdf?index=true
  • https://bda8ce74-54f3-4972-9296-9446b72ec299.filesusr.com/ugd/31bf02_82dafd99064b49efafc894c4e9d39c23.pdf?index=true
  • https://bc819b98-7d7d-4b96-9e1b-9ba47fb22c02.filesusr.com/ugd/4733ca_7296c4d175e34edd871132b76c723a8e.pdf?index=true
  • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/english_grammar_word_search.pdf
  • https://cdn.shopify.com/s/files/1/0481/2059/4583/files/mass_and_volume_worksheets_3rd_grade.pdf
  • 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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