Malicious PDF — malware analysis report

Static analysis result for SHA-256 2529c0681f53e94c…

MALICIOUS

PDF

74.8 KB Created: 2020-12-19 19:23:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 901073915f155a3d9269f274c3c36ef0 SHA-1: a78bc1b4e1d020cd658b3daeaa3fbdff13559207 SHA-256: 2529c0681f53e94ccff53ca4500b81233b082612528c0e8c3bfc186a64394098
196 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 external links, many pointing to SEO redirectors, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://trafficel.ru/123?utm_term=battle+of+great+bridge+map. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?utm_term=battle+of+great+bridge+map PDF link annotation
    • https://rapalavosifezo.weebly.com/uploads/1/3/4/8/134886177/libipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5fc0e65cb9aae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5fa4d825cf830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f893d2b70c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5fdab7433a2c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_5fbf001cb1df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403676/normal_5f936a15864c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_5fa1abb22d01b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5fa7ee5248c9f.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/d3c40c74-f49d-43f2-b3f9-3076cc580901/66538013278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b054b25-443a-4333-a32e-de87b5dd4462/5783735769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6338f15a-e605-4080-9651-4618d50c868a/13400060067.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/acceptable_forms_of_id_california_dmv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd27854-5c30-459f-8050-9c108759e54e/xufevelefivav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5123078b-85e0-4a08-9ae8-2ca86c243f8f/eagle_elementary_school_eagle_id.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_off0000e732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE732 5372 bytes
SHA-256: f4720ba34ba8f945411d3a29621bfa2a86bd3ab7cdded8662a080082c38a95dc
font_01_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 10764 bytes
SHA-256: b50bccaaf00e2c9611175f5c3777896606a1a3e8b64ec18d26ad39fa5a4c6fff

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