Malicious PDF — malware analysis report

Heuristics 6

• 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.
• 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/strik?keyword=tokyo+subway+map+2018+pdf In PDF document text

  • https://site-1036775.mozfiles.com/files/1036775/kajeruwovib.pdfIn PDF document text
  • https://site-1037835.mozfiles.com/files/1037835/samevob.pdfIn PDF document text
  • https://site-1037157.mozfiles.com/files/1037157/62944237615.pdfIn PDF document text
  • https://site-1036625.mozfiles.com/files/1036625/pawovedu.pdfIn PDF document text
  • https://site-1037215.mozfiles.com/files/1037215/27596969589.pdfIn PDF document text
  • http://files.nourishinginsights.com/uploads/1/3/2/6/132695392/nipigepevipakopad.pdfIn PDF document text
  • http://files.hilltopbusinessassociationdavenport.com/uploads/1/3/1/4/131452935/1659712.pdfIn PDF document text
  • http://files.shrewsburycobblershop.com/uploads/1/3/1/4/131406714/b2158d5f1001b5.pdfIn PDF document text
  • http://files.apimm.net/uploads/1/3/0/7/130739247/5623654.pdfIn PDF document text
  • http://files.birdingmoments.com/uploads/1/3/2/6/132681617/1610124.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • http://www.daltonmaag.com/In PDF document text
  • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/mary_ann_ochota_images.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/likagubufexaredigigif.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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