Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd06309fcb0ba1d3…

MALICIOUS

PDF

60.9 KB Created: 2020-08-01 21:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cb833cbd95ae7c1c565567322824dda SHA-1: 8dfded662c527e7efa90a758e0f739332e8fbe92 SHA-256: cd06309fcb0ba1d3600a80b85b35bcd4f7366c3c2ea3109f68d20e7ec5600fa0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, containing a significant number of embedded URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=dark+disciple+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of numerous shopify.com links, while some are benign, contributes to the overall SEO spamming nature of the document.

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=dark+disciple+pdf
    • http://files.inversitymodelmanagement.com/uploads/1/3/2/8/132815003/disiwakasug_regujafixobeme.pdf
    • http://files.cshanice.com/uploads/1/3/1/8/131871698/5531453.pdf
    • http://files.jcpaba.com/uploads/1/3/0/8/130874077/c3ed74ce69dcc00.pdf
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/vmware_workstation_pro_15_license_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/papulabowowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/weber_grill_repairs.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/58523076998.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33435760041.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/48414298897.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0269/files/47972315148.pdf
    • https://cdn.shopify.com/s/files/1/0437/7283/8039/files/25560703108.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/rumafot.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/54407830706.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/43029527909.pdf
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/pewamiwovibavovebese.pdf
    • https://cdn.shopify.com/s/files/1/0435/6423/6968/files/kekokipetowuwif.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_off0000b21e.bin
1b198613bc9fb67713d777f68e9b43d3c59bfc26292e72cada3f8ee3a4e2b772		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB21E 5212 bytes
font_01_sfnt_off0000c3f2.bin
4597cc806d03453fd1d0b6f4a92a8c41de414b91185556e7c1673646211d8fa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F2 10192 bytes

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