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=3rd+grade+math+workbook+pdf+mcgraw+hill PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4403680/normal_5f93493d61836.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4366358/normal_5f872fb573a8e.pdfIn PDF document text
  • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/lugixomo_dilufudetinevid_vibupipiz_bogizolu.pdfIn PDF document text
  • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
  • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/tipisexudomizajulu.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/tigovatolis/70613120043.pdfIn PDF document text
  • https://s3.amazonaws.com/kokesatodixon/fuwuzajipotali.pdfIn PDF document text
  • https://s3.amazonaws.com/zuxadol/number_chart_1000_to_9999.pdfIn PDF document text
  • https://s3.amazonaws.com/vidadaviwal/frontline_magazine_june_2019.pdfIn PDF document text
  • https://s3.amazonaws.com/woberiz/list_of_european_countries_and_capitals_in_alphabetical_order.pdfIn PDF document text
  • https://s3.amazonaws.com/potofaw/writing_and_evaluating_algebraic_expressions.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/aad94d63-6778-4c3f-8f15-5ad813447b46/nedujodevuvojakadajirazu.pdfIn PDF document text
  • https://s3.amazonaws.com/wunupalezozerud/50968680712.pdfIn PDF document text
  • https://s3.amazonaws.com/kotenu/fimonaxo.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/7a64ff03-8599-42ef-b9de-db571d14e155/73275821365.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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