Malicious PDF — malware analysis report

Static analysis result for SHA-256 340f66b326257ce4…

MALICIOUS

PDF

72.8 KB Created: 2020-12-26 23:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b06c9c06f613b3cd4f5bbba381266817 SHA-1: e62914a0cd5524595dc3d0d1c348eb0d10d86278 SHA-256: 340f66b326257ce4881b3e682b1e6a5ef5b99d170ec18b113231ea5c49b1b81e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL 'https://cctraff.ru/123?utm_term=60+inch+desk' is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', reinforcing the phishing and trojan classification. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=60+inch+desk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5f9a9d18c423c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461763/normal_5fc17629e2a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_5f9707856df8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496597/normal_5fc7b9678efd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485152/normal_5fe00286b9131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f92dd10a96d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5fd886cb09c40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f8c0eb79b11e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_5fd1e28e95853.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/leguvefu/ribikitinesuduxujubidaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604410bf-6a77-4768-9eac-b5bcbe30b09b/kewovunigejoxanubume.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD409 4552 bytes
SHA-256: 5c748eef6a4644cdcfc9dead4db75b1ec6406a9bab3fdb56223419790239595c
font_01_sfnt_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 11116 bytes
SHA-256: db71d4daf63fdf6af90c8d3c563b8dd48a268b7f7a24769515a4bed625e9cc8a
font_02_sfnt_off00010944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10944 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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