Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32f460b324ad2d2…

MALICIOUS

PDF

76.2 KB Created: 2020-09-06 10:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1379425a3e3b028596c6039075f598d7 SHA-1: 90ee789755f3e0b83d5761324bd5d8f9f4c2f71d SHA-256: a32f460b324ad2d2be308b7a459a0e4d6fa27f4b297233dec3c878881cf2e0f2
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ttraff.club'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=sonicwall+soho+250+datasheet', suggesting a lure related to a Sonicwall datasheet. Another critical heuristic flags the PDF as a link farm, with numerous external links, many pointing to 'static.usrfiles.com'. The 'SE_BROWSER_INSTALL_LURE' heuristic further suggests the intent is to trick the user into installing something, likely malicious, by posing as a required update or extension.

Heuristics 5

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.club/pify?keyword=sonicwall+soho+250+datasheet
    • https://static.usrfiles.com/ugd/6846fe_06b6c18e2e384eae8703d9c34eb62432.pdf
    • https://static.usrfiles.com/ugd/0a51c1_059ae9730cbc448b80ab7c4402edf834.pdf
    • https://static.usrfiles.com/ugd/b0b521_a70d4009684a4ca08c93678322b49ea1.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_7db9762e0930471387cef13392d64fd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0eb3a93c1f1a424090ce6f63b8e968f0.pdf
    • https://static.usrfiles.com/ugd/740d8c_66008ac517d4443f8211ab934e5b8e21.pdf
    • https://static.usrfiles.com/ugd/b916f4_ccf6cb06223044a989aaca08b54218b4.pdf
    • https://static.usrfiles.com/ugd/8d46c2_715148aacf7d45918efa1853bc0af145.pdf
    • https://static.usrfiles.com/ugd/3c2969_941f948b37514e388707cb3244c7857f.pdf
    • https://static.usrfiles.com/ugd/e8e253_824ea5290e5a460a92d440a0a49d4e68.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3280a7840346168bfa1539943b65ec.pdf
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/87384843401.pdf
    • https://cdn.shopify.com/s/files/1/0449/7804/5086/files/reading_comprehension_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/2267442391.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/xadabaw.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_off0000e039.bin
998bc3f620ca4bcca885551d4f8a069a56a10d7d240bb481ccefba0ab6a76313		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE039 5524 bytes
font_01_sfnt_off0000f31c.bin
bd243f31afefc07e5379eae7ea4300a4beadea8d9e8c2214629d08cab0af14a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 15784 bytes

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