Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6b5b9abd6719c6…

MALICIOUS

PDF

36.6 KB Created: 2020-08-31 21:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75838efa21fc686a931765068273796c SHA-1: e7bad361ef1fe68d6569b6ffa93f00a9ba1c1a39 SHA-256: 8c6b5b9abd6719c6c1631ecabb17ee400f53ec9f5a0d9573160dfe1cae1feb2e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=bodyguard+movie+song++wapking'. This URL is presented within the document body, suggesting a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to static.usrfiles.com. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages. No scripts were extracted from this sample.

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/wix?keyword=bodyguard+movie+song++wapking
    • https://static.usrfiles.com/ugd/07e02c_0ce1da424fd841f081730e2dc697fc26.pdf
    • https://static.usrfiles.com/ugd/b8c837_edd33d551f4f421bb0b5ca9025c349b7.pdf
    • https://static.usrfiles.com/ugd/6cfc61_8a55118997a8401b9729b2882a21c4cb.pdf
    • https://static.usrfiles.com/ugd/735189_53fe3dc1ad26412ebf991a17e37b519f.pdf
    • https://static.usrfiles.com/ugd/04c368_d78175eb5e034b419f569922fda6fc10.pdf
    • https://static.usrfiles.com/ugd/04e6f9_192cf8f7d11544f6a005b5e3eab59448.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6015/files/sulezavudafuvuden.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/20376296377.pdf
    • https://cdn.shopify.com/s/files/1/0457/9183/8364/files/58884275953.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kirojaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/acuerdo_de_cartagena_can.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/social_network_movie_mp4.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_off0000507d.bin
e63ef78ceb36c172aad5b808c9b2816ff68562ae889409e60caed9b0313306fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x507D 5612 bytes
font_01_sfnt_off000063aa.bin
cd4c112206c642297157a67d35ac70b56622fbeb69a4cf2c73fa3abc324e6dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AA 9972 bytes

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