Malicious PDF — malware analysis report

Static analysis result for SHA-256 c308c385b553900a…

MALICIOUS

PDF

105.2 KB Created: 2020-11-24 20:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 19d781dcc895291f8dd2884b014c9509 SHA-1: 1cc819261875276daa8b5916d3362a797bad209d SHA-256: c308c385b553900a400566f60383eb5cffa39fdb7687ba9f5e634afb8891a215
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is disguised as a link to an engineering economics textbook solution manual. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of a malicious URL suggest it's designed to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://traffmen.ru/123?utm_term=fundamentals+of+engineering+economics+3rd+edition+solution+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_5fb7034a26e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377936/normal_5fa5303585359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5faaecbdbef01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5f9afa05b5aba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5fa3d9702eb58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f9f0c74d2662.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/voropa/naxode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8761c21-4b22-4cee-b14e-6597cc7907f1/wizerakumax.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/66381373294.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/73671510770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdb1dca-a1bf-42b3-8f51-69b6f0dfb633/aces_high_game_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c56a200-46df-4fae-b124-d44ae13f7498/unblocked_games_66_american_football.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/45457577352.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/32128423835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/458beaa2-102f-4c0d-9a85-f01503580a3d/baguvimavorunivobuvoregab.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E0 1568 bytes
SHA-256: dabe7eae37578fce973bcdfa76fee4f932fe0d8cc7c9d941a8b0dd9a9f31e690
font_01_sfnt_off00012bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAE 5340 bytes
SHA-256: ca65cb60967e5f8fc801bb3a10c83116242e51be3007a60cd1be2b6ce80f9fd6
font_02_sfnt_off00013dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBA 2408 bytes
SHA-256: 201a82deb7695a5192c9e7c326ac1798ab50f1f656e729806d7cfae2913921dc
font_03_sfnt_off000147c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C6 12328 bytes
SHA-256: 440a12ba9fcdb7eed550ffd0a4e6ecd1a89890e68c534b94a77bde5ee25102b8
font_04_sfnt_off00017080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17080 16116 bytes
SHA-256: dbb7cec6797d6f5843b37e588c166ad41221f2b2810facb6f5b3623775ee712e
font_05_sfnt_off00018560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18560 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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