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=central+angle+arc+length+and+area+formula PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8769565045a.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4380674/normal_5f8b9c0d56a98.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4378620/normal_5f8bf10eb227f.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4455883/normal_5fa21821efdf7.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4445341/normal_5f9f1d104ff66.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/34b8ed6a-e497-420a-ae1e-d39262167756/benjamin_pioneer_airbow_review.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/d001f6e9-6427-49ef-b376-4fe8ea0bb19a/polaroid_camera_snap_manual.pdfIn PDF document text
  • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/58d24122-1d40-4de6-8c60-0553c18112be/pideme_lo_que_quieras_leer_online.pdfIn PDF document text
  • https://s3.amazonaws.com/laradusa/mi_dieta_anticancer.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/b96bf924-34cf-4852-9d1b-eb3f8c675e36/fusobiwiwewupibitafusaso.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/45d7af72-8618-4fc5-9315-cf41102761dd/67316632588.pdfIn PDF document text
  • https://s3.amazonaws.com/jukezeluf/cw_seed_app_apk.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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