Malicious PDF — malware analysis report

Heuristics 5

• 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.
• Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
  PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
• External URI info PDF_URI
  PDF contains an external URL action
• 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://trafftec.ru/123?keyword=unblocked+online+multiplayer+games+at+school PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4380543/normal_5f8d2e3d2b7ad.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4452400/normal_5fa8f8ef0ba4d.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8754ce9a7ea.pdfIn PDF document text
  • https://wanezetisozol.weebly.com/uploads/1/3/4/4/134468493/8387808.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4408993/normal_5fa89586ec44c.pdfIn PDF document text
  • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/b9d11a638d431a6.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4413570/normal_5f988dd34779f.pdfIn PDF document text
  • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/d8b4f785f.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/02d324b3-a24e-48fd-ae98-d644f2ba42ac/42625272233.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/42f32280-7fee-4671-8f74-9401d3383cb1/38961034712.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/d93ff4d3-afe5-4c4c-8f08-8baf875f0fbf/8258828035.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/6984f6cf-64e3-4c92-82ab-eef635c1b8c3/26329241062.pdfIn PDF document text
  • https://s3.amazonaws.com/wivunonovef/autopsy_pictures_2pac.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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