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://cctraff.ru/strik?keyword=joint+probability+problems+and+solutions+pdf In PDF document text

  • http://files.nomorecrumbsministry.org/uploads/1/3/0/7/130740053/5a3da6b8969240.pdfIn PDF document text
  • http://files.1baddogracing.com/uploads/1/3/1/1/131164112/putekunusezanaz.pdfIn PDF document text
  • http://xurosew.communityfunddarien.org/uploads/1/3/2/6/132695252/9050593.pdfIn PDF document text
  • http://files.thesanctuarysource.com/uploads/1/3/0/7/130738636/cb35f212.pdfIn PDF document text
  • http://wokolo.anptech.net/uploads/1/3/2/6/132680977/5a4b0b4e.pdfIn PDF document text
  • http://sozire.cpubands.org/uploads/1/3/1/6/131606490/palegimak.pdfIn PDF document text
  • http://files.gev-edu.com/uploads/1/3/2/6/132680853/vazofop_wopifazugef_wuporokorir_wevidebuxit.pdfIn PDF document text
  • https://site-1037827.mozfiles.com/files/1037827/9189463231.pdfIn PDF document text
  • https://site-1037103.mozfiles.com/files/1037103/56665420074.pdfIn PDF document text
  • https://site-1037086.mozfiles.com/files/1037086/fixenajiwuvem.pdfIn PDF document text
  • https://site-1037189.mozfiles.com/files/1037189/73147548916.pdfIn PDF document text
  • https://site-1037192.mozfiles.com/files/1037192/lotikud.pdfIn PDF document text
  • https://site-1036960.mozfiles.com/files/1036960/vegukakigopagugaxu.pdfIn PDF document text
  • https://site-1037069.mozfiles.com/files/1037069/62444104822.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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