Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b4bb2038c7e2b6…

MALICIOUS

PDF

124.9 KB Created: 2020-08-07 15:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec0cfdf6fb34e8cfe1a09938bdf559d SHA-1: e53ac196cce94fbb7db5c9b7e6779ab6235aea83 SHA-256: e8b4bb2038c7e2b69a86ebddefeeb2cf3e0b8dad5337fbdcc687f8fb20d4de39
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1059.003 Windows Command Shell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a 'Clipboard command execution lure', instructing the user to copy and paste content into a shell. This suggests an attempt to trick the user into executing arbitrary commands. The document body, though heavily obfuscated, contains the malicious URL and references 'wkhtmltopdf', indicating it was likely generated programmatically.

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.com/pify?keyword=batch+file+commands+windows+10+pdf
    • http://files.lavishvas.com/uploads/1/3/1/4/131408572/panowepegirasu_guzidasep.pdf
    • http://files.karinfrye.com/uploads/1/3/0/7/130739027/8432090.pdf
    • http://girogotag.filmtofield.com/uploads/1/3/0/8/130874493/708216.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/44160492576.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/8ch._net_zoo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2305/6545/files/76185852444.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/zumepamirelusamifamokid.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/java_beginners_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/4173/3273/files/70326910263.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/76905619550.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/california_life_science_7th_grade_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/39537863071.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2453/files/79958541560.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_off0001a32b.bin
6b203645bc5a5442ccf3433a498dc286f4572600c17213c864518723ad9c4650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A32B 5636 bytes
font_01_sfnt_off0001b651.bin
5eb04d9d2f786cc7da6ff28e6e6645c633fa207a7f148e6868e8a4289e12525b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B651 15048 bytes

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