Malicious PDF — malware analysis report

Static analysis result for SHA-256 d399f01e66cc0ffa…

MALICIOUS

PDF

44.5 KB Created: 2020-08-18 17:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0408efe62febaa64eafe532a8ccd6af4 SHA-1: 4e08107c11463739d01a39696a5ce1aacaea1790 SHA-256: d399f01e66cc0ffa6a4e63b31db83cc443088437f0c81eed4e8b98cd09db9a50
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, which is also present in the document body. The link leads to 'ttraff.ru', a known malicious domain. Additionally, the PDF contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious.

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=scorpio+car+racing+simulator+game
    • http://files.tattnall4h.org/uploads/1/3/1/0/131069968/zilos-nulajirigevak.pdf
    • http://files.broadsidestories.net/uploads/1/3/1/4/131453214/sijavore-welimomuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/vugurizavaxik.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/agribusiness_management_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/seropikuselapotevisewi.pdf
    • https://cdn.shopify.com/s/files/1/0459/6485/3408/files/the_new_gcse_arabic_companion_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/3478/5430/files/mivif.pdf
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/autumn_leaves_eva_cassidy.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/nonuninuvisededipibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/44467411715.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53551688275.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/1/0430/9427/8293/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000712a.bin
103ec421f3cfe4254c32c6a3ec16193705916bb6713e6a9ef0215a15fd5c6045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712A 5356 bytes
font_01_sfnt_off00008341.bin
0a99b127f0bcfec4893fde1bdae9b388fc573f85daf1a18d189bb94eac6edd98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8341 9924 bytes

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