Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a24d3779c30f0f7…

MALICIOUS

PDF

63.0 KB Created: 2020-12-15 11:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 11ef7f380c4e1431ace7d4ade264ea39 SHA-1: e0ac98f28245dbdfb0f6024304dd3f8286d57e53 SHA-256: 8a24d3779c30f0f749b51728ad93bba72b5c39ca0ba8e6c155d54dac2e924b1a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. The ML classifier also flagged the document with high confidence. While no scripts were extracted, the presence of malicious URLs suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=academy+at+lincoln+staff In PDF document text
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/a5324d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5fa8be332e590.pdfIn PDF document text
    • https://binezorimitujux.weebly.com/uploads/1/3/4/3/134337637/2716351.pdfIn PDF document text
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/kufiji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392215/normal_5fc3b50eae491.pdfIn PDF document text
    • https://ginufadep.weebly.com/uploads/1/3/4/6/134668932/9649701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_5fc1def155139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5fb9cd381c3fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5a00b0-8c1a-49c9-9a51-353fdc514371/gitusipukodogokuletal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff301ea-0ab4-4c4b-b5ac-7dd5b3d42b17/tipodilididalolegaxup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a160e64c-ba0a-4a55-92f2-24ec566bc891/5220787124.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_off0000b95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB95A 5164 bytes
SHA-256: aa9326f5b16e655761272918665a9daabfae161007a64274c3f0f69c207ddb92
font_01_sfnt_off0000cae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE9 10640 bytes
SHA-256: 392214a00fe8b88ed8968035a1204778d88206ecf05722e10099ec07a43171c6