Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a387ae2e4bd2ea…

MALICIOUS

PDF

76.5 KB Created: 2021-01-15 06:35:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6711fc674de0a8b610768b4676523948 SHA-1: 7aa53e771edb24502bb4fe747d262556671f162f SHA-256: f4a387ae2e4bd2ea099c7171bf06e8d0c6d1da1176cf83711cb7a19fd525867a
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 'https://gettraff.ru/aws?utm_term=android+developer+mode+mock+location'. This indicates the document's primary purpose is to redirect users to a potentially malicious site. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/aws?utm_term=android+developer+mode+mock+location In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f9ed414bb722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465545/normal_5fcc8322c0061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_5fa739df2036f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f95f2b13a107.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426944/normal_5ff5e15a04e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5fc164ddd0f0e.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/WkjiMie/4497717691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454550/normal_5faf36be4ddd7.pdfIn PDF document text
    • https://site-1171953.mozfiles.com/files/1171953/cannondale_x_palace_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455381/normal_5fe5e79d29fdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_5fd8f4b354450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f9921d4a369e.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/mexesazaxasa/99896450525.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_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 5152 bytes
SHA-256: 1a012c1114183888007fd3075e58206d258fcae9a46bd6acae460862103b6d42
font_01_sfnt_off0000ff0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0A 11068 bytes
SHA-256: 76a88a104c0136f50ea1c95890540c2dc939398bb3337bdf036cba761ec6d414

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