Malicious PDF — malware analysis report

Heuristics 6

• 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.
• QR-code redirect lure medium SE_QR_LURE
  Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
• 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://trafficel.ru/aws?keyword=install+download+whatsapp+apk+for+pc PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4372963/normal_5f984e69bcfdd.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4383165/normal_5f954b4ba77da.pdfIn PDF document text
  • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/c4c2c509b51f.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/e480b6c8-cbc3-471f-8a42-4ead4382c1c8/lurazedelid.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/26791f99-66a0-484f-919d-96c581a3fe7a/86943376010.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/02932516-be83-4585-accf-4b0002133a96/89732233477.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/417594c5-e994-45ba-96bb-8bc2353e1035/50613067310.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/82ba3723-4558-40d5-bb32-6d19c4200f50/99033021679.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/31898727-9245-432e-80b0-95b65bc0c9d1/mini_putt_unblocked_3.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/1a46fdf6-4121-4212-91a1-19cdf3177a4b/melvern_lake_campgrounds.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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