Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6f94c8a1115f57…

MALICIOUS

PDF

63.3 KB Created: 2020-11-13 07:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 75927a8407e4ae88c1a2bae19a64ee0f SHA-1: 6ed0e5a2a939b58e1508c4b9891b721aea17e5a8 SHA-256: ab6f94c8a1115f57f5c1b97a3a85f70f49e0de9e54f75ad2eee1eca90e773e91
162 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'traffmen.ru'. Additionally, a machine learning classifier strongly flagged this PDF as malicious. The presence of a visual download button lure further supports a phishing or malware delivery attempt. No scripts were extracted, but the overall pattern suggests a malicious document designed to trick users into downloading further malware.

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.
  • 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://traffmen.ru/123?utm_term=unity+web+player+chrome In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_5fa8cf1fb887d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f9a5f3422e9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f91844a322c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460460/normal_5fad8610db7a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5fa06f1787eb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/5984369655.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/list_of_cabinet_minister_of_india_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/54145570766.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/21484916353.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/bulijesaxeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/447cce79-7739-4053-aaa1-63fac6bc65c8/44523058991.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/baby_shark_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/7215298274.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_off0000bc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9F 5320 bytes
SHA-256: 2fb9bc1a9123f4d8c0503c85f53175a641bbb1f98c87d0c1eafc475c2a9fb0a9
font_01_sfnt_off0000cea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA2 10012 bytes
SHA-256: 8992ecd91eb1d449e425cdbf336f951488d1a8f7deab0f9fac396d4e2ac32214

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