Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db67ec63defd197…

MALICIOUS

PDF

45.7 KB Created: 2020-08-21 09:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be5a87adbae0e4a6dea35641e89c7c73 SHA-1: 7fe8b179e1d47ea55d96f3d6d3b03d6e55925743 SHA-256: 2db67ec63defd197791db6844c38c829a6c41f9d4865c5c6364ebc1f8c7b98b8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=lightweight+pdf+reader+for+windows+xp'. This URL is presented within the document body, disguised as a download for a 'lightweight pdf reader for windows xp', which aligns with the 'SE_BROWSER_INSTALL_LURE' heuristic. The PDF also exhibits characteristics of an SEO link farm, with numerous embedded links, including one to 'cdn.shopify.com/s/files/1/0432/1027/7025/files/67500051009.pdf'. The primary attack vector appears to be social engineering, tricking the user into clicking the malicious link under the guise of a software update or utility.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=lightweight+pdf+reader+for+windows+xp
    • http://files.muskogeecountygenealogicalsociety.org/uploads/1/3/1/4/131437724/fofemuloreku-dajugu-vibokufato.pdf
    • http://bafizob.wildwestrebels.com/uploads/1/3/0/7/130740514/1f76b.pdf
    • http://files.thecbdjunction.com/uploads/1/3/0/7/130739475/297355.pdf
    • https://cdn.shopify.com/s/files/1/0432/1027/7025/files/67500051009.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bepojarovizezeba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/gobarosikumup.pdf
    • https://cdn.shopify.com/s/files/1/0440/3858/6518/files/dovegapisu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/jerawax.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0742/files/phpstorm_license_server.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/76486215981.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/garetixifap.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/26645847270.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_off00006cd1.bin
cbbab4075d478bde1dc4ad6cb2af1c0c5e0299b10d528ff20e1544d4dc7d19aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD1 5372 bytes
font_01_sfnt_off00007f35.bin
dfdd2bc3157c2d69c98bf4b6c7ad49b566781a6794dca7d56d0601aea3cb7a2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F35 13496 bytes