Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2835da18c03b31…

MALICIOUS

PDF

62.2 KB Created: 2020-08-29 10:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4ca849af77b0066b9ad9523ef2c7c30 SHA-1: dffb1d2a7a05229b420e8a8787bbfe0ac080d7d8 SHA-256: aa2835da18c03b318e12606f2b8a3c529b287940365d2f4236ffd9f3ec6a145b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1566.002 Spearphishing Link

The PDF contains a heuristic firing for a malicious redirector link, which points to `https://ttraff.cc/wix?keyword=cmap+tools+software`. Additionally, a heuristic indicates a browser extension installation lure, a common social-engineering tactic. The document body, though heavily corrupted, contains fragments of URLs and text that align with these findings, suggesting the primary goal is to trick the user into clicking the malicious link.

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.cc/wix?keyword=cmap+tools+software
    • https://static.usrfiles.com/ugd/b8c837_dd4d65ea4f9444d2a5a347f9902067be.pdf
    • https://static.usrfiles.com/ugd/b8c837_336f596ba27c480999a14ffcf8c66fd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea853b393fef4fabb0aa58f16eb44639.pdf
    • https://static.usrfiles.com/ugd/b8c837_52090792789c447db2ed2b25b9c8073f.pdf
    • https://cdn.shopify.com/s/files/1/0431/2141/0210/files/wabipavorumozekanakud.pdf
    • https://cdn.shopify.com/s/files/1/0435/8121/0787/files/wazopenelujedofivozix.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/bounce_pro_trampoline_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/zipapul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/dimab.pdf
    • https://static.usrfiles.com/ugd/b8c837_758a16ec0518498996994908b41602d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_57d8b4ca0f5e42e581439fe89b7e7018.pdf
    • https://static.usrfiles.com/ugd/b8c837_048140dc2c5d46d5a66a8433c1475249.pdf
    • https://static.usrfiles.com/ugd/b8c837_fccd731b42f74610a5930a82362ecd28.pdf
    • https://static.usrfiles.com/ugd/b8c837_24a2109d6d6a4ef2a82f3fb2642d547c.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_off0000b3d5.bin
25b2fd46b83a4ba70f919570ae9d75ac988dcededacc347dc27a1df4e2278b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D5 5044 bytes
font_01_sfnt_off0000c4f2.bin
d7bf68e2a67e5a557e46beafb69c2945f889f8e01baefed018cd2080571d9696		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F2 11792 bytes

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