Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4a215a0d4d4a6f…

MALICIOUS

PDF

69.6 KB Created: 2020-12-29 10:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 4d5c4f38d522cf4e03d7b5cbc96a05c3 SHA-1: 7969c2b8ee19dd3a817e3163cf1f5c51f53a6de3 SHA-256: 0c4a215a0d4d4a6fc03bfe858fa8ddbedcc489dfc0d9c1eea4ea20245e235da4
202 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains multiple heuristics indicating malicious redirector links, including one pointing to 'cctraff.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a download button lure further supports a phishing or malware distribution scheme, likely involving a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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?utm_term=subway+simulator+3d+free+download+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_5fae0a3e8bd86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5fd105f5ddaf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420441/normal_5f9f1f55ebe6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5fab3c35de797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fccef10bd514.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375528/normal_5fe256197c912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424646/normal_5fb4a5a829f8d.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/272d81ff-3f6a-4ae4-b908-1c4085c5a1a4/43606165534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09a1ff2-07e3-4b65-82ff-bf4c3bb04fec/21445167511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1ac6a3-6b50-4816-aff8-2ca17e56afa6/plasma_tv_repair_novi_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d4ab78-0d2e-416e-94cb-78be074264a2/80496315325.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_off0000d06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06B 5900 bytes
SHA-256: f040ce509c3ff36dad46591e55320818caa245008dae2d9848df1c30dac69278
font_01_sfnt_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 10960 bytes
SHA-256: 7f7b80cd5c44e6074c2294c3069c274a65095dde20911352825efc1495606379

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