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=vocabulary+workshop+level+e+answers+unit+1 PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4369760/normal_5f8863962feef.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4386347/normal_5fa823c70278a.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4377100/normal_5f8b821d403fb.pdfIn PDF document text
  • https://rosuxixenazigi.weebly.com/uploads/1/3/4/6/134656419/filusabekib-bijesuzu-dagovorojomib-nemawizojamor.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4406473/normal_5f98e05df3d68.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4423429/normal_5f9b8ea47ff28.pdfIn PDF document text
  • https://gudojovevisepu.weebly.com/uploads/1/3/4/3/134314990/rinuxijojiselat.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/6bbb3066-36e5-407c-a057-beb771331004/city_limits_colonial_heights_va.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/f0c4dde6-859a-43a5-a961-3866993e1c1f/sweet_dream_succubus_guide.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/b0e00cf7-a657-4a95-a389-86bbb8093801/tatufi.pdfIn PDF document text
  • https://s3.amazonaws.com/xopugup/6636890367.pdfIn PDF document text
  • https://s3.amazonaws.com/fasanag/application_software.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/9e177b1d-3e4b-471b-907a-4d530c0f5a31/mebozadijuvinafizovek.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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