Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a7c629b8b5ed99…

MALICIOUS

PDF

58.5 KB Created: 2020-11-24 16:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8ec3a08671b27e24de71207f0f4ba389 SHA-1: 904a674f3cfb4d73f4f23078ef42bdf4a32d6c20 SHA-256: a6a7c629b8b5ed990e4dc8afd64bfcb7ca25a52d07c2766668661afa6b25b19e
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 embedded URL 'https://ggtraff.ru/strik?utm_term=rural+king+paducah+ky' is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/strik?utm_term=rural+king+paducah+ky In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478414/normal_5fb5e1967a453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f871221bf23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fa799fe72c7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f8e9f0408547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_5fafbb39f36d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_5fa93a54db8b7.pdfIn PDF document text
    • https://www.ruralkinIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivuxo/jegilu.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/tizisovodalovivixines.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/siwis.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/palodifudafotatoponaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c8be778-0ef1-4af2-831c-06f37ee39ce4/xigekosejirexori.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/xezowiga.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_off0000a7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7EE 5332 bytes
SHA-256: fb306c9063da99dbe2705c8ec726337147e9a6aae4d42145d757d71541e733c8
font_01_sfnt_off0000ba14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA14 10176 bytes
SHA-256: 6cf23faa98fc48bcb9875a0eedda9b21ae4e92e46cc92c80f6db442a066ccff3