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=matematicas+bachillerato+ejercicios+resueltos In PDF document text

  • https://site-1043519.mozfiles.com/files/1043519/2238449916.pdfIn PDF document text
  • https://site-1039215.mozfiles.com/files/1039215/jaburadesida.pdfIn PDF document text
  • https://site-1040329.mozfiles.com/files/1040329/78995470576.pdfIn PDF document text
  • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005b75.bin)
  • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005b75.bin)
  • https://uploads.strikinglycdn.com/files/24e4ea67-67d5-411a-accf-bb09f18f8012/68242113874.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/91dcd1e4-0851-4651-91d8-f38ccef4c443/84125109611.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/a86a78ab-1596-4e69-be97-bd26cd248fe0/xowel.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0486/4324/4200/files/tobofinebelulaxowa.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0483/8660/5207/files/libro_san_agustin_confesiones.pdfIn PDF document text
  • https://cdn.shopify.com/s/files/1/0481/6722/3445/files/16675055882.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/aa1f62b1-c985-4ea8-91fc-f36c72c376c8/13815896102.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 extracted file (font_00_sfnt_off00005b75.bin)

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