Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b63f65f2442586…

MALICIOUS

PDF

70.7 KB Created: 2020-12-22 00:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a72df890c6502bf987e76ce26dfb4169 SHA-1: 1447a9197034e7b337d3e6202c067b370d1b801b SHA-256: 78b63f65f244258600b2908f593ec9a8be89185124d9a9253c8259b4dd3203de
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to 'traffmen.ru', a domain commonly associated with phishing and malware distribution. While no scripts were explicitly extracted, the PDF structure and malicious URL suggest it's designed to lure users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=chiir+2020+proceedings
    • https://static.s123-cdn-static.com/uploads/4486206/normal_5fc8e04030b30.pdf
    • https://cdn-cms.f-static.net/uploads/4457318/normal_5fa0990ee2970.pdf
    • https://penaletaxexek.weebly.com/uploads/1/3/4/8/134886030/1994810.pdf
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/silaluv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc23c267acac6192a0ad0cf/1606564903342/66985810835.pdf
    • https://static1.squarespace.com/static/5fc10d1bea4a794d5645e011/t/5fc7fdfcb87ce24ef2a86654/1606942205563/takimoko.pdf
    • https://uploads.strikinglycdn.com/files/6743ea14-f4aa-46ef-a747-e97f12e304b6/94774804849.pdf
    • https://static1.squarespace.com/static/5fdd3a932dcd53187f1eaf8b/t/5fde3bf12629b066abaf459e/1608399857422/kunajafuwezakurojab.pdf
    • https://uploads.strikinglycdn.com/files/9909cb42-b3d4-46d4-967a-217643e8d4c9/nejinupadamowix.pdf
    • https://uploads.strikinglycdn.com/files/1138c9a1-6b7a-4741-b591-d483ed143022/kuladovurijujuvu.pdf
    • https://uploads.strikinglycdn.com/files/70dfe3b2-8773-477d-9730-7c0a5e167e09/73698976539.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3f40eaf37e3b64675e8c/1606303553072/romeo_and_juliet_act_5_quizlet.pdf
    • https://uploads.strikinglycdn.com/files/56eca450-cc11-4272-9fe5-7912f08c7418/kawowejimodobofo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da73.bin
d347e47ac089bf565f1ef4c9ff526be3c155d5f8a4aa97a26954344ce6512f71
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA73 5272 bytes
font_01_sfnt_off0000ec5a.bin
f7e2c047aafd0adad977a5d293747cea924b55934f2fb6c7d3b3a85488683fec
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 9968 bytes