Malicious PDF — malware analysis report

Heuristics 5

• PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
  PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
• 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.
• 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://cctraff.ru/strik?keyword=ejercicios+de+acento+diacritico In PDF document text

  • https://site-1048209.mozfiles.com/files/1048209/tuxaz.pdfIn PDF document text
  • https://site-1038808.mozfiles.com/files/1038808/2924975414.pdfIn PDF document text
  • https://site-1037828.mozfiles.com/files/1037828/zifuwobirupir.pdfIn PDF document text
  • http://files.krishnaandnatansh.com/uploads/1/3/2/7/132712099/214c78bd03.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/85816828-f8b0-462f-9b0f-1094e462b397/72047119155.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/cbc82d96-b4c4-4a60-85c3-91e195faa5fe/wemozinapotigenadu.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/b2bcee8d-37bf-4038-b255-d023549a98cb/jusaxali.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/109df786-f24d-408c-b337-e4909b835dde/xofumevud.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/8d7d72d5-4da9-44f1-945f-1a20abeb34f5/fuzexubef.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/fca0717a-3b63-4bba-b6bf-8909785ccbac/lexowokenazafu.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/221c8253-308f-4311-8ef1-9dc35142a56a/jusosonubelo.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/aab34ec5-b15e-4637-b455-0c6f8aea9369/vorulesa.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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