Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a08668b1474e8d…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 09:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ab9fee44117bdb8bd185c36a42251d SHA-1: ca15a37a13dee972e12681c29c31b4c27754d0d3 SHA-256: b5a08668b1474e8d8b1bc4347ac563b88a422949e3376e54545d1f739b5f582d
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword related to web development. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a lure to external content. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=angular+template+or+reactive+forms
    • http://files.simplybebodywork.com/uploads/1/3/1/8/131871912/8773435.pdf
    • http://files.whitethornherbals.com/uploads/1/3/0/9/130969573/954346.pdf
    • http://lonej.terraobscura.net/uploads/1/3/0/9/130969439/nebizimop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0432/3078/9800/files/adamic_nature.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/jukuvumajosivefav.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/gurimumujejofos.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/jodasuvapudin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5857/files/cyberpower_625va_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4480/5525/files/70115725760.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/tulan.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/wasexirijewefujix.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c1.bin
c560d06bd5f7d7dda183470ac250fc8d05249be6ca27000f04c5bfb23768bbda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 5384 bytes
font_01_sfnt_off00007704.bin
6695303709abb87bea83b6cb838be6480cd92f9cb5434c289a6dfc0bf442a7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 10580 bytes

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