Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de3b7b8ca2049d0…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 06:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0669efffef4afa5a08d6d5aec40a49cd SHA-1: 28859ab58ac17f7b2ac92d866b8ca88298e9e345 SHA-256: 7de3b7b8ca2049d0d7f39b6551c3c00aed7ec268630a43bbf881a76fb4186474
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a link farm and a redirector link to ttraff.ru, indicating a malicious redirection attempt. The document body, though heavily obfuscated, contains text related to financial accounting and reporting, likely serving as a lure. The presence of multiple embedded URLs, including a redirector, suggests an attempt to lead the user to a malicious site. The heuristic 'SE_CALLBACK_LURE' further supports a phishing or scam pretext.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=financial+accounting+reporting+and+a
    • https://static.usrfiles.com/ugd/b8c837_2c5c661847a24ede85af15664830ebeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d88e6aefc154d86af4391af79b3df07.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_e35e8bdae4ae4e16a0c2d3d5a2f6d29c.pdf
    • https://static.usrfiles.com/ugd/efb3f0_0992d08cb2fc424c8d7fda69783a63c1.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/4419754113.pdf
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/3908364414.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/vixexejepelub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/anti_social_social_club_font.pdf
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/44578853949.pdf
    • https://static.usrfiles.com/ugd/e73fea_65350d36839b455e820351fa8dfdfd74.pdf
    • https://static.usrfiles.com/ugd/b8c837_885c92d5ba4a4cb8bff8f0cc4e663f9c.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_off00005f65.bin
54c3ff0f5bf0b23bc348eb7443ade91f55ba7f650dca9a6677189275abd3bdf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F65 5016 bytes
font_01_sfnt_off0000707b.bin
be513e5be8a321b0489a6ad1be89e0158ace102c92a03e3e6da6eddb338e6d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707B 10972 bytes

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