Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6560b873af287ef…

MALICIOUS

PDF

44.8 KB Created: 2020-11-01 08:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c09f93433ee963a13a9361033b066657 SHA-1: 4c2a6019198c53a237c31611e58fa22bc657f25e SHA-256: f6560b873af287ef91cee6d459e9a11e659e047ce2576440376d49624204c444
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with a critical heuristic identifying it as a PDF link farm. One of these links, 'https://ttraff.ru/123?keyword=delta+variable+speed+scroll+saw+40-540', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting an attempt to manipulate search engine results or direct users to malicious sites. No scripts were extracted, but the presence of numerous links points towards a phishing or SEO-based lure.

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.
  • 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.
  • 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://ttraff.ru/123?keyword=delta+variable+speed+scroll+saw+40-540 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f90cb3fe005c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f8e4247829bf.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/3974900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8a060242930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5f98bdcf7e5ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_5f9a9d2073d8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f8f437d49456.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/ff90c541-883c-4733-ad7d-2952e126f37d/cyber_bullying_essay_tagalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e59a28-bd4b-4fb7-b378-1306b0db21f9/9002121756.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/brooklyn_zip_code_map.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_off00006c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 5744 bytes
SHA-256: 2d4f4894668de6afe7cf8cb51a753a881c4e2cefdc7f2cb490dffc93fd519dca
font_01_sfnt_off0000804c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804C 11424 bytes
SHA-256: 4864c4da42692c7eaaee40f0fa3484d64bf0d3b3b85bf6d7411e762d842f126e

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