Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d4ff22401ac1f4…

MALICIOUS

PDF

56.3 KB Created: 2020-12-06 20:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fedf3d0aedd7e244ac9c8ea438471acc SHA-1: 1ac69a877dff5fb1b3d77fb31a47136bee6974ab SHA-256: f7d4ff22401ac1f4ffb6ed6bf4d5260738dfec51971f1b356fd41da63c01be34
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV and an ML classifier, and it contains critical heuristic firings indicating it's a redirector and part of a link farm. The embedded URLs point to known malicious infrastructure and numerous other PDFs, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7321

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=circle+of+the+shepherd+d%2526d+beyond
    • https://sokonova.weebly.com/uploads/1/3/4/3/134322069/bidulojudonaro.pdf
    • https://cdn-cms.f-static.net/uploads/4425772/normal_5fa163b83c474.pdf
    • https://virubavu.weebly.com/uploads/1/3/4/7/134755547/jujafafozebupikuzob.pdf
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/nikuweregiju-lowobopet.pdf
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5f9ff7b86727b.pdf
    • https://jijalasigode.weebly.com/uploads/1/3/4/3/134344414/a1bae7.pdf
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5fa37e5fe66ee.pdf
    • https://cdn-cms.f-static.net/uploads/4419857/normal_5fa12e9e470e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fc2a6cd9ee0f32b87a9cb0a/1606592206359/20222484736.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe493b145a8629dc7db4a3/1606306110966/dunkin_raptors_vs_t_rex.pdf
    • https://uploads.strikinglycdn.com/files/c409b479-af46-459b-b5b6-b3153e3ebfb8/jabefonitiwetewimenoweg.pdf
    • https://static1.squarespace.com/static/5fc5621e8139af03766314ec/t/5fcc7f9b9aa2de0c648c8e12/1607237532828/rdr2_companion_app_not_connecting_to_ps4.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e9.bin
72b849d3fe010ec435dbc0b87ac2f206aa4d27fbd6615f73628ef950cc082b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E9 4936 bytes

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