Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed605c71d101d123…

MALICIOUS

PDF

66.1 KB Created: 2020-12-27 14:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 746fc0085cb64e8cd32307d6f32462e2 SHA-1: 690a9c43605d5324904b359cb0b5e43112b3b7fd SHA-256: ed605c71d101d123972f076b7060f0d24e0cfb43ae327c10354a3e2c514a11e5
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/wb?keyword=trackitt%20h1b%20specialty%20occupation%20rfe'. This indicates the document's primary purpose is to lure the user to this malicious URL. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing or malware distribution intent.

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://gettraff.ru/wb?keyword=trackitt%20h1b%20specialty%20occupation%20rfe In PDF document text
    • https://static.s123-cdn-static.com/uploads/4421336/normal_5fcdf99a9d3c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f874dff1fdc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5fc603b3ab015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5f8b464039d4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451940/normal_5fe196d728595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fc66f7745457.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/fevobelijogal/loving_you_easy_sheet_music_zac_brown.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/93657150970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/766e4b1a-0b6b-4066-bfe8-1a47516332a3/kozofubov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78df5e2b-e502-4ff4-8de3-bb63be522818/twilight_breaking_dawn_part_2_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/sample_formal_application_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/tipos_de_anemias_y_sus_causas.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_off0000c4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AA 5412 bytes
SHA-256: e50fb6b01f0790432bcc6526c1117e74c1a77abbf64d2fec35dfee7fc87551cd
font_01_sfnt_off0000d718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD718 11380 bytes
SHA-256: fddc7fcbeb9c82e469ff9134d0002b7f51ae7176db06a187785e00185cd5c0c2

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