Malicious PDF — malware analysis report

Static analysis result for SHA-256 164b64205ae459cb…

MALICIOUS

PDF

75.6 KB Created: 2020-12-18 15:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6426e2b942e7cc7ce63641358283714 SHA-1: d5f0b6f3f22d9db33b1faf24da293039efd53af3 SHA-256: 164b64205ae459cb1beb10eefb0e72d1fe1077c300615552a13cb8671b8864cc
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 a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of this file. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL suggest an attempt to redirect the user 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/aws?utm_term=ftl+unlock+all+ships+guide
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5fabe7a85c71b.pdf
    • https://cdn-cms.f-static.net/uploads/4423714/normal_5fb68242d234d.pdf
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5fa3deed61015.pdf
    • https://static.s123-cdn-static.com/uploads/4475999/normal_5fcc5c0706e70.pdf
    • https://woxujinugav.weebly.com/uploads/1/3/4/3/134305359/foxidorupaxev-zaniwitij.pdf
    • https://cdn-cms.f-static.net/uploads/4458838/normal_5fa155d61e41d.pdf
    • https://cdn-cms.f-static.net/uploads/4467300/normal_5fb7224006c80.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc65710085bf90c0e2241e5/t/5fd0f27042b86665b38a5e9d/1607529074890/63402663755.pdf
    • https://uploads.strikinglycdn.com/files/58ad3f72-f3de-44e5-8179-3c731a2def67/pisilowug.pdf
    • https://static1.squarespace.com/static/5fce08b1bb7ea8683c95c538/t/5fd07606ef76c20f2d499dd8/1607497229960/11th_street_diner_miami_beach_fl_united_states.pdf
    • https://static1.squarespace.com/static/5fc378dd6b97992eb56c2202/t/5fc5fa92e6d49a06bb60e142/1606810259808/vemal.pdf
    • https://uploads.strikinglycdn.com/files/4805d472-1e7c-440b-89dd-e187da143fbc/how_does_bacterial_transformation_work.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_off0000ebb6.bin
18b18065c755dab75fa2ea935b326e17cf52b8e16b62a6b5e7afaf5a4d8f0048
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB6 5256 bytes
font_01_sfnt_off0000fd9f.bin
07685160a7a8e88c755ee0162a30fed7f626e06bf5194fddb5ec2f6478421b7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 10608 bytes