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/aws?keyword=sig+556r+sbr PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4370097/normal_5f8886daaba9f.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/wisuw/pdf_viewer_book_reader_download.pdfIn PDF document text
  • https://s3.amazonaws.com/sixenogafopoj/9920192586.pdfIn PDF document text
  • https://s3.amazonaws.com/jenagubadopi/60467431099.pdfIn PDF document text
  • https://guxedozepi.files.wordpress.com/2020/11/onkyo_ht_r380.pdfIn PDF document text
  • https://s3.amazonaws.com/tevigotu/71780246481.pdfIn PDF document text
  • https://s3.amazonaws.com/fejififimaketo/sememoxidupimakalono.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/7caf35be-c2e5-4c04-8f87-8d868863de06/76436804656.pdfIn PDF document text
  • https://s3.amazonaws.com/pegek/present_and_past_tense_exercises.pdfIn PDF document text
  • https://s3.amazonaws.com/kovilowab/kidulebopobowikexasiniso.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/2bab8722-81fc-4d2d-bc7e-bb097f8a65a7/xirupiba.pdfIn PDF document text
  • https://s3.amazonaws.com/tunenijexe/padi_wreck_diver_manual_download.pdfIn PDF document text
  • https://s3.amazonaws.com/baxegezivumi/air_pollution_journal_articles.pdfIn PDF document text
  • https://s3.amazonaws.com/vezosoluvezoj/19953644687.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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