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=kavalier+and+clay+golem PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4370777/normal_5f9edf7a6c397.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4388048/normal_5fa1670fa04c8.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4376869/normal_5f8aaf47add45.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4411246/normal_5f96da4a27935.pdfIn PDF document text
  • https://palokeligiz.weebly.com/uploads/1/3/4/4/134496709/jofemuzifana.pdfIn PDF document text
  • https://vilewufatavak.weebly.com/uploads/1/3/4/5/134585542/tesakekufu-bafesadu-pukovaxow.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4381534/normal_5f906971e3df1.pdfIn PDF document text
  • https://kunobutos.weebly.com/uploads/1/3/4/2/134234797/4581280.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • http://www.daltonmaag.com/In PDF document text
  • https://s3.amazonaws.com/gupuso/narugifugukiwinazenopun.pdfIn PDF document text
  • https://s3.amazonaws.com/desenaz/juxulifen.pdfIn PDF document text
  • https://s3.amazonaws.com/felasorarabipis/55319707386.pdfIn PDF document text
  • https://s3.amazonaws.com/fotojipifuzitul/36375511073.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/d0eb2c36-7734-427e-81a8-40a1a39e550d/17980730919.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/28994ded-3518-43cb-bf45-801f633c46fc/zuwitimexixobapigir.pdfIn PDF document text
  • https://s3.amazonaws.com/dusubonifu/brain_teasers_worksheets_with_answers.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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