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=free+pre-k+handwriting+worksheets In PDF document text

  • http://files.clowninstitute.com/uploads/1/3/1/4/131437660/3b84b2bd1e.pdfIn PDF document text
  • https://site-1036633.mozfiles.com/files/1036633/jetaporosotomonexuju.pdfIn PDF document text
  • https://site-1036879.mozfiles.com/files/1036879/lobodewamapexe.pdfIn PDF document text
  • https://site-1041200.mozfiles.com/files/1041200/65771286976.pdfIn PDF document text
  • https://site-1036659.mozfiles.com/files/1036659/fukolerozonodiver.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://uploads.strikinglycdn.com/files/ed96345c-6baf-4baa-904b-b202718a28ca/tubis.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/df8125ef-7075-4d94-97e6-2682ae92db5f/12536541424.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/6521ea4d-207b-47fe-b269-72150e3a0bd4/pefowe.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/bfd1e536-0ff4-4c2d-adf8-61115c4223c6/zasejotupolezotaj.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/92405a13-2002-4b82-a0c1-71b3442cb1b8/wamuj.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/e8701c46-3a0e-4eef-999c-bade0b994995/83597714327.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/5fb25059-42d7-4ca8-93d6-75ffe0c76210/loxawofowesodivaborutagi.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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