Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed71c6d571b30a3…

MALICIOUS

PDF

45.0 KB Created: 2020-07-31 05:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46f67fa7e7ac9bdec2348dd398c32341 SHA-1: 54c620c6be47effec0d0ce4eee5d257579c43b6f SHA-256: 3ed71c6d571b30a38f708def7f62334d94b8a796302ad6af72492415e67b65ac
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated, but the presence of a link farm and a critical heuristic firing for malicious redirectors strongly suggests a phishing or redirection attempt. No scripts were extracted, limiting further analysis of the payload.

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=doppler+carotidien+pdf
    • http://files.jessicatchang.com/uploads/1/3/1/3/131398515/pilazokumufo_wujafewuginomu.pdf
    • http://files.discoveryroofing-oahu.com/uploads/1/3/1/8/131856380/6862220.pdf
    • http://files.spanishrecipeswithsofia.com/uploads/1/3/1/4/131409717/somatimobut-xeduwojamu-bekogunuwebexi.pdf
    • http://files.huyettm.net/uploads/1/3/0/9/130969703/kulevizozade.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/90136661854.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/60747584004.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/27003466932.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/dazavosurovezexudo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/7075964148.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/75840561946.pdf
    • https://cdn.shopify.com/s/files/1/0431/1914/9216/files/72896653353.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/sexapoluxuf.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_off00007384.bin
9aae28edfef86808d70dec168feccb1dc393ba795690578b67832223d0fa5cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7384 4756 bytes
font_01_sfnt_off000083b5.bin
c155ecf8bd25c8e582b3b1e37a0562ee95bb61c73a888f95eaafa38483fc0ed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B5 10492 bytes

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