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/aws?keyword=sample+teacher+retirement+letter+to+employer PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4374517/normal_5f9ca8a38e596.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4368745/normal_5f90d55927bfc.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4463560/normal_5fa8482eaca7c.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4413475/normal_5f9b695f69193.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4379612/normal_5f8b6e346220b.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4370987/normal_5f98207c83ecf.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/b5615f55-0b39-4a14-80fd-4197ce86b72d/88756483376.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/bd05654d-3ce7-42ba-b074-11e6fb2de620/gexano.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/9f3b3e06-c4c4-4cba-8b24-9a12c97e7f54/rigexidomeser.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/96da00a4-7ae1-4a27-82ce-13fe72f2fc59/dafababomowit.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/97f58626-acb5-42f7-9ade-21ddc86ab4dd/where_are_you_now_lyrics_britney.pdfIn PDF document text
  • https://podigukili.files.wordpress.com/2020/11/wofenegegimosinalin.pdfIn PDF document text
  • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/6cae7bd7-0491-4708-b843-bd6f1764bbc0/42110319146.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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