Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5612a164e1348c8…

MALICIOUS

PDF

49.7 KB Created: 2020-07-30 08:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c071a26fe233485b22ffe58353454f6a SHA-1: e6aa89bf4e29337a4f5b366c82e0ec2f2b3e9ff1 SHA-256: e5612a164e1348c85035ca27a5fd2665cff32733dc74936e507ad092bb07d1f3
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. This indicates an attempt to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains keywords related to 'bryophyte life cycle' and 'pdf', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm heuristic, likely used to improve search engine ranking for malicious content.

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=bryophyte+life+cycle+pdf
    • http://files.martinisbistro.com/uploads/1/3/1/8/131856212/kibupizunili.pdf
    • http://files.matchmypartytheme.com/uploads/1/3/0/7/130775651/rujezela_jawabar.pdf
    • http://files.koogletheatre.com/uploads/1/3/0/9/130969454/1712d500.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/24088329714.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/21393046905.pdf
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/6258821677.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/wapatutem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/73115788392.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/lakizusarakujuxelitudutig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdf
    • https://cdn.shopify.com/s/files/1/0437/3728/4762/files/koverigilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/toxofijuso.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/lezewes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/bobuzufod.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_off000087c0.bin
e67cc7c09c684f6eddcaac04e76837a387bde91b8c7cb9743111fc7592caea02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C0 4688 bytes
font_01_sfnt_off000097d2.bin
5ed81176ec29220a8a3a88752a3420ce66d8b4a1ebe22485ce1cebf76458511d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97D2 9940 bytes

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