Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bfcdf9d8633cec…

MALICIOUS

PDF

39.6 KB Created: 2020-11-07 18:38:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: ea97adcd448e94e8d1b43b75ce2332e7 SHA-1: 3ba9e2141b86810061be9310c80019f8110b4292 SHA-256: 72bfcdf9d8633cece8c97857682e58ba1eb2aee4730bd58cfad42df55f7182de
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/123?keyword=2+letter+words+for+scrabble+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f875f26d36d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421207/normal_5f966f9b7e450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_5f99d5b9acfd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_5fa2dc879f0e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f89e54f9ddbf.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/7b271088-0f97-4da7-bde8-c7d25d6d57cc/mufevok.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/38715330170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95d8899-53eb-4b83-aec1-1228f8b977d9/nasodajovekumezoro.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_off00005c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C81 5608 bytes
SHA-256: 43ad2e0d1c58c6b90403a3c3d04794c81948c4b347b94c7c854056d6a005406e
font_01_sfnt_off00006f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 10200 bytes
SHA-256: d3f68415fedbd5a8b5aad9d08e10abbdd497588bccbdb7d47cd19461d19b981f

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