Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa8196672db6af9…

MALICIOUS

PDF

66.2 KB Created: 2021-01-13 17:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d64607d241bd626699fedabfdc2da57e SHA-1: b3c6e98ceab81fa182dfbe6096f34ef5e755e57e SHA-256: caa8196672db6af936e1275f71e455a9bdf2d47778ff62e1c02485aa2c09c7ed
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 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL suggests the document is designed to redirect the user to a site that likely hosts further malicious content or phishing pages.

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://traffine.ru/123?utm_term=dell+22+monitor+-+p2214h+manual In PDF document text
    • https://cdn.sqhk.co/durotula/SgahVha/german_shepherd_puppy_wallpaper_cave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fdd339f9ea12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_5f944b9886ea4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453329/normal_5feb57359cbe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_5fd1c599876a7.pdfIn PDF document text
    • https://cdn.sqhk.co/nepelusir/ijbjeje/fortnite_building_unblocked_games_76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477401/normal_5fdfc4fa53d5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446162/normal_5fdf0a80b340d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385613/normal_5f917a1f88240.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/julaxel/princess_leia_theme_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/vugafubemep.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/caste_certificate_form_telangana.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/38197259849.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/87838719057.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB49 5064 bytes
SHA-256: 1403d4a314a947ea33d3adf1b53701cf6619c8c24635f8c27fb94f69e03ae712
font_01_sfnt_off0000cc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5A 9932 bytes
SHA-256: edc8d4c529ab1ef914a03b24709f5ac55d77128f5d6235075ca6912c9a254169
font_02_sfnt_off0000ee1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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