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://trafffe.ru/123?keyword=worksheet+er+and+ir+verbs+spanish+answers PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8709a06bd18.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4369322/normal_5f8f790753b3d.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4365547/normal_5f8734a6264ae.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4366633/normal_5f88021d4f4ee.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4415974/normal_5f9b74d7abbb9.pdfIn PDF document text
  • https://sevebara.weebly.com/uploads/1/3/4/5/134501605/liberiv.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4472186/normal_5fa48a23f3ca7.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4367287/normal_5f87bdf37a917.pdfIn PDF document text
  • https://pojetepanale.weebly.com/uploads/1/3/4/3/134361345/7e68087b47c.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4384835/normal_5f903a558e866.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4383917/normal_5f8be3edd9f07.pdfIn PDF document text
  • https://rurizurerenudiw.weebly.com/uploads/1/3/4/6/134649160/wudasotojosoduxulag.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4471096/normal_5fa5ff7d87b14.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/34f97502-aeb2-42cc-a980-05a90b161c2f/composition_of_matter_worksheet_answers_key.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/c777cb03-4a51-4395-86ec-f1be8d699e4e/74054603722.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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