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.
• 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://ttraff.ru/wb?keyword=measuring%20angles%20using%20a%20protractor%20worksheet%20year%205#measuring+angles+using+a+protractor+worksheet+year+5

  • http://files.breedingforthefuture.com/uploads/1/3/2/6/132681566/sutavumuz.pdf
  • http://files.balloontwistersdcvamd.com/uploads/1/3/0/9/130969375/gipagazovupibiz_tolokaduwimola.pdf
  • http://files.grundmeyerleadersearch.com/uploads/1/3/1/6/131636990/sifixoj_jutixepipi_bevasagipaxuja_sivosukisozi.pdf
  • http://files.savebozeman.org/uploads/1/3/1/4/131408529/80336d.pdf
  • http://files.sidleystandup.com/uploads/1/3/0/7/130775942/3089407.pdf
  • http://files.schec.net/uploads/1/3/1/8/131871894/6851944.pdf
  • http://files.risingravenband.com/uploads/1/3/1/3/131384018/buvab.pdf
  • http://files.duanebrownlaw.com/uploads/1/3/1/4/131483253/2887604.pdf
  • http://www.ascendercorp.com/
  • http://www.ascendercorp.com/typedesigners.html
  • https://wekekikozet.files.wordpress.com/2020/06/73888743202.pdf
  • https://duvuzeso.files.wordpress.com/2020/06/28214601759.pdf
  • https://fapodafa.files.wordpress.com/2020/06/81986131467.pdf
  • https://xalimiganifa.files.wordpress.com/2020/07/23141921915.pdf
  • https://zitipon.files.wordpress.com/2020/06/nijetemixis.pdf
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#
  • http://purl.org/dc/elements/1.1/
  • http://ns.adobe.com/pdf/1.3/
  • http://ns.adobe.com/xap/1.0/
  • http://ns.adobe.com/xap/1.0/mm/
  • http://ns.adobe.com/xap/1.0/rights/
  • http://scripts.sil.org/OFL

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