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://traffset.ru/aws?keyword=hgfhhjhhlgbtb+vf.f+csr+r4rth PDF link annotation

  • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/d32d0d80f.pdfIn PDF document text
  • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/tiluronor.pdfIn PDF document text
  • https://dexajuvado.weebly.com/uploads/1/3/4/4/134470202/zotirusug.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/0240ac70-163c-4a9d-9631-1972a7b0280f/11101323188.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/134acfa5-ef0d-424a-a8a2-58e59e8f2215/lobixivam.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/af2ec527-e7a2-4fe4-bf43-41c1f3a9bbd3/gisofatav.pdfIn PDF document text
  • https://s3.amazonaws.com/penale/21091490626.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/6fc4faf2-b6e9-42f8-9a55-f273dab4da92/migotepuvenavenorezadi.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/af6fc042-ca5d-4f4d-a8d2-4e86be8ac64a/busemovijugafor.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/4e822198-4a60-4f43-9748-39e48417f7e3/pesowejapunajok.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/0862351d-de22-4cd8-9040-7c194880c570/mojeku.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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