Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecdadafca72b603…

MALICIOUS

PDF

64.5 KB Created: 2020-12-19 23:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 279348c92992e418e5920ba80e12b85e SHA-1: d13e18c8611d6c310bacadae2b0faef45373c4b1 SHA-256: 2ecdadafca72b603a84a1ce90327a45e1981c64046cd22dd551da8c6fcdd9f9f
214 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically for containing links to known malicious redirector infrastructure and a large link farm. The primary malicious URL identified is "https://traffmen.ru/strik?utm_term=charles+capps+healing+video". While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to lure users to malicious sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=charles+capps+healing+video
    • https://cdn-cms.f-static.net/uploads/4391907/normal_5fb5a8e45bc72.pdf
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f88be1751976.pdf
    • https://boraweterepin.weebly.com/uploads/1/3/4/8/134864111/3949427.pdf
    • https://static.s123-cdn-static.com/uploads/4486061/normal_5fcf3134ac78f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc56c10405d5340f3480a85/t/5fca75135846d15d25f4eb31/1607103764226/reset.pdf
    • https://static1.squarespace.com/static/5fdcb80a4f759b768e16b9b4/t/5fdce8e661cf5c15964abc31/1608313062814/guia_ceneval_psicologia_contestada_gratis.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf493af3de5e49b55a4fc9/1606371643099/golden_lab_puppies_mn.pdf
    • https://static1.squarespace.com/static/5fdd37863f59a2572d8ffde5/t/5fdd5b0b6a6ad7222fff8d91/1608342283645/barry_irish_former_world_featherweight_boxing_champion.pdf
    • https://static1.squarespace.com/static/5fc2a898abaecd33182d8009/t/5fc486654e98326c02a2461b/1606714981655/kutuxumabozadafuwibatibe.pdf
    • https://static1.squarespace.com/static/5fc50cb47d0c8f249d5ba047/t/5fd6d18e7fc52c20693597cd/1607913870420/triangle_area_and_perimeter_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf7b.bin
ec1bc9b8dce17e501beba9287816d61fe84eb560a9e9f263d5762927c7363c40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7B 5300 bytes
font_01_sfnt_off0000d17c.bin
5493780bdc6f75cfa35f4e0183fc38bbe9104f580d7902cb51a3f1a122c4b1d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD17C 10748 bytes

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