Malicious PDF — malware analysis report

Static analysis result for SHA-256 129cb0a322daa616…

MALICIOUS

PDF

67.8 KB Created: 2020-11-10 19:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7a3704ff149e1631642f1db05424be21 SHA-1: c626f1d2aa4c747cde25fdc99f08e2162d5c5050 SHA-256: 129cb0a322daa616f1ab998b588814068781f03794c15c8df915d9c60aa4a986
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'gettraff.ru'. Machine learning classifiers and ClamAV also flagged this file as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?keyword=ward+colorado+newspaper In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5fa407a9ab0c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_5fa84e481dfce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5f9f2949eedb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f875b8ed5a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_5f8f587bd3da1.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/53d72db7-f801-48ad-ad72-96006bf8bbd2/8921671181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced197b2-568f-468f-988a-6021411bdc8a/58282767703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edcb54d-0c05-4413-90d0-fc289ba2b09e/tiwugidudekit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10b97ff-6d8d-4df4-b43e-e000987fb6aa/sapabuwaxenazovulufanifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6d0cce-8a31-40ab-81b4-598af80c068a/46492353641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8c2d27-efe7-436a-92cf-5247ea420ee7/51849553663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f677a9-3b2c-40cb-9363-d9a37acd6e8e/vimemadetatomufiwezalumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6fda91-d80c-4db8-b8e4-d78d043011b8/wamozokifotijaperaniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d209f0cf-c6a4-49b3-8150-ee617758e976/45355352149.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_off0000ce65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE65 5172 bytes
SHA-256: fa6e1f31c39f9c9b5fff3f237c1badf81b58c92442a6597b629a911b19fbc832
font_01_sfnt_off0000e026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE026 10100 bytes
SHA-256: 5ea7c7e3443af42f7ca226fefb24197c5d851c9046f1d7f426e33a0c1ddfeb67

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