Malicious PDF — malware analysis report

Static analysis result for SHA-256 c051c4269490dc24…

MALICIOUS

PDF

39.8 KB Created: 2020-08-17 14:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a332fb7eb21ab183de9d14d0d42c4d8c SHA-1: c33d1308a2c5796952c461b99e77fcc4418e961e SHA-256: c051c4269490dc24726e242cf052d39102e0549561ce5830637d12c67c1fa28a
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a critical heuristic for containing a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The embedded link, 'https://ttraff.ru/pify?keyword=ajax+php+contact+form+with+validation', is the primary indicator of compromise, leading to known malicious infrastructure. The document body, though heavily obfuscated, contains references to the same URL, reinforcing its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 2

  • 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.
  • 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://ttraff.ru/pify?keyword=ajax+php+contact+form+with+validation
    • http://files.comicatcreations.com/uploads/1/3/1/3/131382696/1c0bb75.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/facebook_ads_guidelines_text.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/67286189818.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/sine_taylor_series.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/20585722097.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/gozofubadulojiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1923/files/20932786513.pdf
    • https://cdn.shopify.com/s/files/1/0434/6419/6256/files/occupational_therapy_assessment_tools_for_autism.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005aa5.bin
b5eb70691d70422858a0e466623d763efb283feee587be0f7680473eb329da7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA5 5500 bytes
font_01_sfnt_off00006d41.bin
9840b5b24a148462d679e77a3f73637b27c9003d5203625cc8f778289ba461ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D41 11084 bytes

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