Malicious PDF — malware analysis report

Static analysis result for SHA-256 266cf1860582246f…

MALICIOUS

PDF

74.6 KB Created: 2020-12-27 01:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5fe62478cf6b879b1f5203a89d5fdf46 SHA-1: 712982cd45a8f8054b73c827e7c125d072326b03 SHA-256: 266cf1860582246f365e7ae1c5b4f5911e1ca0ac9d013cf86a79136ae1d573e6
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary malicious URL identified is traffmen.ru, which is likely used to redirect users to further malicious content. The presence of numerous PDF links suggests a link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffmen.ru/strik?utm_term=rocky+horror+picture+show+music+videos In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_5fbe9758e45f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_5fadd16f8754d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f87ece49a45d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_5f9b7ba5b5910.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/65e6fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471988/normal_5fc70d27c2b6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_5fd1e421cb76b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382618/normal_5fdf9af296c8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_5fa7e03fb0753.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/gegove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5fb2a3797db9b.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/5de774ab-83c2-446b-9eff-b214d4c34c76/community_first_credit_union.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/photoshop_cc_2019_crack_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/21574008246.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/zafojo.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/analog_ammeter_and_voltmeter.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/vidmate_2014_apk_free.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_off0000e3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 5396 bytes
SHA-256: 5131fb6c39b1d5f8761fb7cbf8b91c315b6c5227fa8ad1a2a268f85bbd5843cc
font_01_sfnt_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 11824 bytes
SHA-256: 6d70aa4777c60fa229ef8d13575b5ff7e94faebf3adc8ec047946da2ba3816bc

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