Malicious PDF — malware analysis report

Static analysis result for SHA-256 478e93bd403c7a6a…

MALICIOUS

PDF

41.1 KB Created: 2020-10-07 21:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 92f4180386e0a5475b8620db6242bd8c SHA-1: 0b0d87147493e02e185910f171ee52184ed6da4a SHA-256: 478e93bd403c7a6a5ddfd2cfd4c2e4d61e44f13ac5f6892cfc6ea4938f49fe91
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=essay+writing+book+pdf+free+download In PDF document text
    • https://site-1039720.mozfiles.com/files/1039720/gaboxalolikiwenipibezi.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/pejulesuraxewelejezatogu.pdfIn PDF document text
    • https://site-1037903.mozfiles.com/files/1037903/lotalek.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/a1fb45be-5017-4bcd-bc54-9a962c43fd8c/87981123641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41873f3a-5575-45ba-b977-be7607e54d3b/30917111276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e5dd0b-92bc-48dc-b298-70b869fa3cf7/68345554598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7737b1d7-1937-4acd-8d1c-5777240f2751/45244912982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494119d6-e692-4e6a-9961-1026dee38113/gigoletinagapufosuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2475203b-1831-4f09-afe0-4ecec2e718ea/37905261077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a83cae-2a1b-4852-9f57-74cb40425f15/dizonisijenelijirudazi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6332 5564 bytes
SHA-256: f3e4cf8f280ee6cc74f70baa5366bcfeb01471cf87204706b69bfef64cd93738
font_01_sfnt_off00007646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7646 9912 bytes
SHA-256: 40d6b185d1a316cb5b16ef6d2fe3988abcd56d8b24800292ec3eb38f8dd58643