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://ggtraff.ru/strik?keyword=spelling+test+for+grade+8+pdf In PDF document text

  • http://files.handyvillage.com/uploads/1/3/1/4/131453355/xowepedop-ruduzudifipero-dikavebewavu.pdfIn PDF document text
  • http://bukab.apicaucusinstitute.org/uploads/1/3/2/8/132814900/gegemegu.pdfIn PDF document text
  • http://vaxen.fossilfreepenn.org/uploads/1/3/0/8/130874493/2330957.pdfIn PDF document text
  • http://xobafe.taypiping.co.uk/uploads/1/3/2/8/132814930/7020812.pdfIn PDF document text
  • http://files.wigglybuttstraining.com/uploads/1/3/0/7/130738741/b6d4be2e8afc43.pdfIn PDF document text
  • https://site-1036637.mozfiles.com/files/1036637/88811122042.pdfIn PDF document text
  • https://site-1039918.mozfiles.com/files/1039918/koxoda.pdfIn PDF document text
  • https://site-1039610.mozfiles.com/files/1039610/39745118993.pdfIn PDF document text
  • https://site-1038590.mozfiles.com/files/1038590/wixoganutula.pdfIn PDF document text
  • https://site-1037019.mozfiles.com/files/1037019/93013904790.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/07e74b10-646a-4ceb-98de-80db2c8142cf/56018578407.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/f29f12cc-3187-4121-814f-bf185e20c51e/66395615340.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/a10704ae-0b29-4676-b95e-140e3fcace52/94783288100.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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