Malicious PDF — malware analysis report

Static analysis result for SHA-256 9201a9bedf80f147…

MALICIOUS

PDF

32.0 KB Created: 2020-11-03 21:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 36626b9589ee52ac0e39981586337d6a SHA-1: f26fc26ec8dae9d6798ca1b12f63236262c84900 SHA-256: 9201a9bedf80f147b228072e76a8a646ad42728f4bc403aff91d425bba608284
94 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though obfuscated, contains text that appears to be a search query, suggesting a lure to a malicious site. No scripts were extracted, but the presence of a malicious redirector indicates an attempt to lead the user to a harmful destination, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/strik?keyword=horizon+treadmill+t101+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5f9c349c8f928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8cc87c80448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_5f9c31f1a15f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f9196427821b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f8e412d64e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f93892f2f8ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/zigilexowifir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc265450-f5b8-4a38-b196-b1bf8a442a66/19364095335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5355d9-7c73-47a8-84f0-ec1f91c63662/vobametu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9681829e-0dc5-489c-928f-94ca9e839ff0/noxisogikekitojujupun.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/nijewipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0bae286-d836-44b1-aeb0-2a1509423543/gesar.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_off00004273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4273 5000 bytes
SHA-256: f926c0e48fcc3030ab25fc3b0b6a7e5e1e9ad0344965dd66419f7dadafa99c60
font_01_sfnt_off00005361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5361 9372 bytes
SHA-256: b8f6d08c0c25b14d6db756ee4f626d7377518c19a8560632e9e92e52d307c667