Malicious PDF — malware analysis report

Static analysis result for SHA-256 40da728b95ade452…

MALICIOUS

PDF

86.0 KB Created: 2020-12-20 06:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d1505c84d9638324f1fa813d97a5c265 SHA-1: 93d3bf7202c5ba3d5fd54f30feeb3dbfb80c64fb SHA-256: 40da728b95ade452ff5e833be24878d2fc54332b8a268584ef9fc39db615c4ea
162 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/strik?utm_term=keto+go+fit+pills+african+mango'. This URL is associated with phishing and malware distribution. The document body, though heavily obfuscated, contains keywords related to a product ('Keto go fit pills african mango') and the authoring application suggests it was generated by wkhtmltopdf, often used to create malicious PDFs. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=keto+go+fit+pills+african+mango In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453889/normal_5fb43324065c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f93427c910b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fd5f27ac4552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_5fa1d53e1882f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492897/normal_5fc3187f88695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0d2f2d26ff1194f734ddd/t/5fc12eecf3de5e49b58f2214/1606495981538/dianetics_the_modern_science_of_mental_health.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdeb274fbf4ee0481da8a5f/t/5fded4b2459323513bd6cccd/1608438962210/lovilotugurebimixexem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78cb91969b523a421460e/t/5fce990e7cc32b039187bde2/1607375118929/45611325752.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc509b1affbf90a660519c5/t/5fd023a71c49363a9b3fde11/1607476137253/elastic_car_sandbox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc504c07848ba205d332f1e/t/5fcdc8d583d2ac65cc33bafe/1607321814592/fruit_charming_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f1dc52-4d69-4b89-8008-b6e440ed65c0/horus_heresy_black_books.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdec22607af9e0e16fda9dc/t/5fdec6e1fb7de13a646272ed/1608435425659/67144755803.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_off000112dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DC 5304 bytes
SHA-256: e6a89774bccba1cb22e7faeda970bd937fbae6d64186cd230937fa3e315ebf98
font_01_sfnt_off000124e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E1 11384 bytes
SHA-256: 6eecca156518eb4505d4928ab8e0e4ee5551cadc5d515f063707e2d347f1576d

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