Malicious PDF — malware analysis report

Static analysis result for SHA-256 45617ae78c164e37…

MALICIOUS

PDF

42.9 KB Created: 2020-08-29 22:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f5639b124e08c51e08a154bb2a28659 SHA-1: ea5e2c79fb9d5fc91c7d55335d419460e6be5f61 SHA-256: 45617ae78c164e37c2787530ef085333b7bad5f3b74ff98a27f3cb7e2f89967d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF contains a link to a known malicious redirector, ttraff.ru, which is part of a link farm. The document body, though heavily obfuscated, contains text and URLs that suggest a lure. Crucially, a heuristic indicates the document tells the user to copy or paste clipboard content into a shell, a common technique to bypass initial security measures and execute downloaded payloads. The primary malicious IOC is the redirector URL.

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/wix?keyword=how+to+unlock+the+forgotten
    • https://static.usrfiles.com/ugd/b8c837_e8d5142e7c894a51bdee1eaed8d5c0eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f5ae58e2d734e10b331da350aea6af8.pdf
    • https://static.usrfiles.com/ugd/b8c837_05f9fd05704643bcb590d79a516f4ca2.pdf
    • https://static.usrfiles.com/ugd/b8c837_81b87fe516dd48da9ca8c03f5954dd05.pdf
    • https://static.usrfiles.com/ugd/b0b521_40fd2983888c4dc4b1739c883d0b0844.pdf
    • https://static.usrfiles.com/ugd/b8c837_8966cdd46d774439b8575ae65da3d8bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_849ea72b66b94d2296ea6375bc26e85b.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_8eb230fd84294c78a57a0852d8c2f20b.pdf
    • https://static.usrfiles.com/ugd/ace02d_eb72aa05558e437e8c1d9e2c5b7bd75c.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/11984348455.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1269/files/99133620297.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/bamiyan_menu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/dictionary_biochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/download_abbyy_transformer_free.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_off00006a4c.bin
884821851139f1fb5f7d95352358d50bd2cac47d0b6cb6a3e54fa88ed02d23e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4C 4872 bytes
font_01_sfnt_off00007af2.bin
dc2e284e4056b33cd23f61e79c36f9df2a548ab68f55950125b45e095da5ea1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF2 10548 bytes

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