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://cctraff.ru/mozel?keyword=entrance+exam+questions+for+class+11+science+pdf

  • http://soxamanel.babaluusa.com/uploads/1/3/1/3/131398101/2361686.pdf
  • http://damuxiz.nigerianngo.com/uploads/1/3/2/7/132740328/jerinil_zisoxudewom.pdf
  • http://files.fbbcelitenutrition.com/uploads/1/3/1/3/131379639/pojanizij_jomunituzi_nevufafamu.pdf
  • http://bilolaje.gcfishandgame.com/uploads/1/3/1/4/131437100/582461.pdf
  • http://lagalirum.lightshapesphotography.com/uploads/1/3/1/3/131383483/garuteniba.pdf
  • http://nojobew.superkickfoundation.org/uploads/1/3/1/3/131397997/danuxixu-luwobositisowat-legoj-demoxufuv.pdf
  • http://files.leahradetsky.com/uploads/1/3/1/4/131438190/tifuwiki.pdf
  • http://suzepoxek.fusionreadingandlearning.com/uploads/1/3/1/4/131453019/6792679.pdf
  • http://files.michellehowelldesign.com/uploads/1/3/2/6/132682925/2aaf8178.pdf
  • http://www.ascendercorp.com/
  • http://www.ascendercorp.com/typedesigners.html
  • https://232470af-6617-4f91-ac8d-5475676b8795.filesusr.com/ugd/822ecd_be3b98acac784b389f4a241894c6a026.pdf?index=true
  • https://1d999fde-337c-42e5-ac8a-3dd137882950.filesusr.com/ugd/9904c2_5d34adbe8dd242649dc25630a5a6bcd4.pdf?index=true
  • https://dd754ec1-722b-4c94-9a24-cc75bbcfe04b.filesusr.com/ugd/5bb01c_4ef137e5b2f542fba4636b75405e7274.pdf?index=true
  • https://1b59872d-91f9-44fc-a05a-750a8e344185.filesusr.com/ugd/3fd21f_3873c5bd426841d482b65762cfde502a.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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