Malicious PDF — malware analysis report

Static analysis result for SHA-256 e949392485395cd6…

MALICIOUS

PDF

77.8 KB Created: 2020-12-28 08:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1efb2823daa11f0e3ace86b92091065a SHA-1: b9154a11dc72c451774afb7f64f94bb571bb4b47 SHA-256: e949392485395cd62f7e65b7fe91d25ab3d9884350299f180093ad91821a6dc7
162 Risk Score

Malware Insights

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

The file is a PDF that contains a link to a known malicious redirector, traffking.ru. This indicates an attempt to direct the user to a malicious site, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

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://traffking.ru/aws?utm_term=google+sheets+pivot+table+formatting In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f89c06730eb8.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/cc0b5212d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_5fae29fc57ee4.pdfIn PDF document text
    • https://bivixogerixud.weebly.com/uploads/1/3/4/4/134469213/tirowoniwu-zapixowaxosoj-jidivu.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/VkZbfUd/line_official_account_manager_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xanutabe/tG6jen3/average_premium_for_medicare_part_d.pdfIn PDF document text
    • https://giridoxaxe.weebly.com/uploads/1/3/4/7/134703098/1346757.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/0fdf6c.pdfIn PDF document text
    • https://cdn.sqhk.co/milibotobov/ujcqJhc/sezefokutexe.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/ruzumeb/80661293756.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_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 5544 bytes
SHA-256: 63883e28463b31f9c14a0c0321e40a6181002f2d54a5c02eb63e93ef41c35e58
font_01_sfnt_off00010593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10593 10924 bytes
SHA-256: cc9cf3e48d1d379360699f1ef63c53dadadd7764acc69eb5e6cfdbc38509d086

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