Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7538968fa21246…

MALICIOUS

PDF

36.9 KB Created: 2020-08-27 15:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e44c37ef8f1b1f0a23dc05e384b5bc6 SHA-1: 039b0ca18784d2f12a68086a8db2f576f271daeb SHA-256: 7b7538968fa212460ce0ef192b7a305e8a41f4f7ede17720d72e8b6ff8c79595
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=jackson+dinky+wiring+diagram`. Additionally, another critical heuristic flags it as a PDF SEO link farm with numerous external links, including one to `https://cdn.shopify.com/s/files/1/0439/9710/2238/files/edit_online_free_with_same_font.pdf`. A high-severity heuristic indicates the document body contains a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running malicious code. No scripts were extracted, but the combination of malicious links and clipboard command lures points to a downloader or initial access attempt.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=jackson+dinky+wiring+diagram
    • http://dokevi.uccbaycity.org/uploads/1/3/1/3/131378898/a95211a0b17e6e2.pdf
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/edit_online_free_with_same_font.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/converse_plataforma_negras_rebajas.pdf
    • https://cdn.shopify.com/s/files/1/0432/1932/0992/files/skinny_love_tuning.pdf
    • https://cdn.shopify.com/s/files/1/0437/3698/9850/files/voxujuxuvewum.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/lemisirowerevubaguvix.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/53587621822.pdf
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/96943657049.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/fuwotegebola.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/kifapegazunugukido.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_off000051cc.bin
00316592812deb960360e752460b74d0cb6ba9a4500617b9b405734b843b5ad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51CC 5476 bytes
font_01_sfnt_off00006468.bin
21eef4332d5455bb051c5f7e8bf8b63900ac65c2f58b763d30d6058b9b57e5ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 10244 bytes

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