Malicious PDF — malware analysis report

Heuristics 4

• 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 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/strik?keyword=msc+zoology+entrance+exam+books+pdf In PDF document text

  • http://lisoti.ironcovedesign.com/uploads/1/3/2/7/132710714/0a12c146.pdfIn PDF document text
  • http://duzidusis.starboycreations.com/uploads/1/3/1/4/131454151/nilamatukigid.pdfIn PDF document text
  • http://fizajet.ritualapothecaryptbo.ca/uploads/1/3/0/9/130969077/vupis.pdfIn PDF document text
  • http://files.craftopoliscraftclub.com/uploads/1/3/2/8/132815866/5804725.pdfIn PDF document text
  • http://files.thehot-boxcompany.com/uploads/1/3/0/7/130739780/gaboneju.pdfIn PDF document text
  • http://files.hallchristyhouse.com/uploads/1/3/0/7/130740420/5065efa3.pdfIn PDF document text
  • http://gofiloxot.crackingthehungerartist.com/uploads/1/3/1/6/131636947/4165799.pdfIn PDF document text
  • http://motizu.littlesmokyski.ca/uploads/1/3/1/4/131408899/7956158.pdfIn PDF document text
  • http://files.stefanprystawik.com/uploads/1/3/0/8/130813948/f1203b99fae38a.pdfIn PDF document text
  • https://site-1040100.mozfiles.com/files/1040100/xufonabelonopa.pdfIn PDF document text
  • https://site-1039344.mozfiles.com/files/1039344/kejevujuxi.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/4341b6be-986e-4a27-9898-277cea8ff743/wefazemanefusozeja.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/8f5c051e-d681-42eb-b4e5-03aa0f6c3429/33373682177.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/3f137a2e-aa85-402d-bcf3-b114ef7e8d49/bulaparazipok.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/43abdff9-2103-4268-9de1-9afb9b53e66e/71629972022.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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