Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf3bfd97ab245a8…

MALICIOUS

PDF

96.7 KB Created: 2020-12-02 22:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 62e92f3c7b49e0ed85e5a67137ef2a23 SHA-1: dbd3d3ac3693fe260a7441488d84e014bd926ac1 SHA-256: 7cf3bfd97ab245a8a22ff6bf139c69a60c8ded8befd7eab2616f0abc24dd245d
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/123?utm_term=bobby+bones+dating+app'. This indicates an attempt to direct the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the link suggests a phishing or malware delivery attempt, fitting the pattern of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=bobby+bones+dating+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5fc2f2a79d5e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409000/normal_5fc76322e9a01.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/kabisebax/kipixirinililezosuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf060f8cdb769c6a84021/1606283360578/30065167175.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54070c14dfd36fe0e2b11/t/5fc6c9f5e2dcb1274dda09e7/1606863353684/good_co_op_switch_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c69acc6-6ebb-4fb9-9c87-335a2e108754/when_is_a_lookout_on_a_vessel_required.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/12619315150.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/fema_is_100_b_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/50641902090.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc021705e8e827d4289a3fa/t/5fc0e9669d79364840ae9707/1606478182293/belixikamaxalex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bcfb81-1228-492a-b131-151f21c36891/97259075257.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/barron_s_sat_2_biology_book.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/darkest_dungeon_bounty_hunter_guide.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_off00013c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5C 5288 bytes
SHA-256: 11e98245fe7338165975a9aa8134a53bed80a4a32db629746c6a69653e2bfa84
font_01_sfnt_off00014e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E77 11788 bytes
SHA-256: f7e70b7b6586a16566ae264b3f8cadbe3ad69cb49afc96471fe5e661e248f7a8

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