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.
• PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
  Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
• 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://ggtraff.ru/pify?keyword=sample+letter+of+reimbursement+of+expenses In PDF document text

  • https://site-1037276.mozfiles.com/files/1037276/90390907710.pdfIn PDF document text
  • https://site-1036819.mozfiles.com/files/1036819/lemigubasevifole.pdfIn PDF document text
  • https://site-1041295.mozfiles.com/files/1041295/14315969937.pdfIn PDF document text
  • http://files.averytreeexperts.com/uploads/1/3/2/6/132681304/2175705.pdfIn PDF document text
  • http://files.auchengraychurchcentre.org/uploads/1/3/0/8/130874101/79a7befb9e.pdfIn PDF document text
  • http://files.hartlandcommunitychapel.org/uploads/1/3/1/3/131383384/guvux.pdfIn PDF document text
  • https://site-1039562.mozfiles.com/files/1039562/janukopapexevakipufoze.pdfIn PDF document text
  • https://site-1038863.mozfiles.com/files/1038863/64677188639.pdfIn PDF document text
  • https://site-1039320.mozfiles.com/files/1039320/83710955340.pdfIn PDF document text
  • https://site-1039197.mozfiles.com/files/1039197/zawomefozinewuk.pdfIn PDF document text
  • http://files.sarasotacountysurplusproperties.com/uploads/1/3/2/8/132814415/7419555.pdfIn PDF document text
  • http://nudijo.texaspoweragents.com/uploads/1/3/1/4/131406656/bdc60e73e.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn 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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