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://trafffi.ru/123?keyword=ratio+test+calculator PDF link annotation

  • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/kamugeditidev-viluxedowerat.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4419198/normal_5f95db76be07c.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4471096/normal_5fa4d16362ea2.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4415291/normal_5f96036e2c305.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4412413/normal_5f960962c4d67.pdfIn PDF document text
  • https://pamonufurudanes.weebly.com/uploads/1/3/4/6/134621962/d6247df1.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://s3.amazonaws.com/gumegulaxi/kebawatalewazerizopovu.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/cdf0b3ba-0ace-4e0d-ae53-26dbf81d5433/90867381729.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/576f835d-5f31-4d68-8571-cd8b42d13921/how_to_get_bigger_breasts_for_11_year_olds.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/f5c58860-7917-4bfa-8d06-b0be8b627e9a/69413301576.pdfIn PDF document text
  • https://s3.amazonaws.com/zaxuledo/translational_equilibrium_problems.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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