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.
• 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.
• 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://traffine.ru/123?keyword=big+brother+jokester+updates In PDF document text

  • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8754221e883.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4366341/normal_5f954d1a2a102.pdfIn PDF document text
  • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/71a7067cd1d.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4421466/normal_5fa8598f95deb.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/17329cc2-1e6f-45d5-95f8-80a6f8790147/61150200268.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/1af93968-96a6-4498-b693-78281f99f232/zusupanine.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/ba96e9e7-1a88-4f19-abb9-6a185b1b2f34/83454496091.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/fbdd70f3-0622-4512-a3f7-6e4f2edeb650/takikakubafuf.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/64dfba73-456c-46b8-aa78-bbd1e17a568b/29526190169.pdfIn PDF document text
  • https://s3.amazonaws.com/liguwubore/huffy_20_rock_it_boys_bike_parts.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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