Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6340927c04715a3…

MALICIOUS

PDF

70.3 KB Created: 2020-12-27 19:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0aaad1ebe9140be2ea2976e8929426e2 SHA-1: e5d2476cf70dba2642af4d7b5ae0067fe2dca54e SHA-256: b6340927c04715a38a7f0a82ae45f88eccbde2cc44936204e2c517bca4f181dc
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://traffking.ru/aws?utm_term=slack+for+ubuntu+terminal' is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the malicious link suggest an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

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://traffking.ru/aws?utm_term=slack+for+ubuntu+terminal In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f8f267ea8773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463287/normal_5fad62c47011f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f8f86c61eb0b.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/5hbfNnN/sonic_adventure_2_battle_gamecube_save_file.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5fb2cc2f2c2c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fcc1fc5b7a6b.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/7784c2fa-ce58-44d2-a860-21a3bed2bf53/14562798869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc139918-488f-45e0-8271-cba2c55e267a/61466479770.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/47066069319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7dd627f-72d9-43f9-ad85-fb1258b43f63/gabex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40f85e9-3915-44eb-90a8-14590a463db0/utah_drivers_test_study_guide.pdfIn PDF document text
    • https://<workspace>.slack.com/appsIn 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_off0000d4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E7 5156 bytes
SHA-256: db78e242c33526d324e88538bcb39dba0d1d76f9d4e4cf2040ce986496265083
font_01_sfnt_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 11236 bytes
SHA-256: b2458b89c8737d1d8b17b770d1c34af1ed17e7cd97d1d282008a93e0715f6149

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