Malicious PDF — malware analysis report

Static analysis result for SHA-256 193b691f058d2222…

MALICIOUS

PDF

75.5 KB Created: 2020-12-16 06:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cc1885ff05a520e363b9a3bbb98c1625 SHA-1: bb6496f8b0203b2cafd05d20548938a8a136ae2e SHA-256: 193b691f058d222286e289eee49497e38efa3c04214980c5f716b58398b5ab3f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, consistent with phishing or malware delivery. The document body appears to be malformed or heavily obfuscated, preventing a more detailed analysis of its content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=etsy+custom+trailer+hitch+covers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f920d2e24aa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5fafdef65b2ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445337/normal_5fd0536524a40.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/nimuwet/95732932757.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/audiobook_sites_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/badrinath_video_songs_telugu4u_net.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/64679238225.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/drivers_license_renewal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7925ca4492a057e243d95/t/5fd6381f5b1f6f7539d18c68/1607874595060/kupipadumujenevad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc345ab8ef7301f8b201dbc/t/5fcd5f22fe657040d5a3d851/1607294754600/neluxod.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/simple_rental_agreement_format_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/lorepil.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_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 5156 bytes
SHA-256: 4c2145aa81d83c58c0444e021fcaba473bae8b96244cda0ee79258a7b11310fb
font_01_sfnt_off0000fd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD79 10500 bytes
SHA-256: c6f1b374cd3b10733f42f4f3ae0462bce33dd3a52a205fef808e8c8dc7acae69

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