Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef7ba158cc6b690…

MALICIOUS

PDF

45.6 KB Created: 2020-09-03 23:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49be7d4c80a3e0726f851b6e1173b2db SHA-1: f9091b3bbd9935d2ac9b9a05f949623fb066155e SHA-256: 9ef7ba158cc6b690318206fae4688f5964c57d6192b5d828779c428b8987b282
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=top+ten+banned+games+for+android'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Another critical heuristic identified a PDF link farm, suggesting a broader campaign to distribute malicious links. The document body, though heavily obfuscated, contains the same redirector URL and numerous benign-looking PDF links, likely intended to mask the malicious intent.

Heuristics 3

  • 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.
  • 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.me/wix?keyword=top+ten+banned+games+for+android
    • https://static.usrfiles.com/ugd/6cfc61_118728b5e18e419eaf974820dd43cdb6.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_38c6b3cb1e264d7f9bdcb909cc5cffd8.pdf
    • https://static.usrfiles.com/ugd/197ed4_6595d52bbf324b8b8783f890d6dc0986.pdf
    • https://static.usrfiles.com/ugd/769f78_ead74e65e1fb42248fe25553d32f3043.pdf
    • https://static.usrfiles.com/ugd/1c8c1e_026931f77abd40089db68f5a3d388d01.pdf
    • https://static.usrfiles.com/ugd/d2751c_8641466a69464ce29f40e19e23d12ff4.pdf
    • https://static.usrfiles.com/ugd/45e30f_caebb9a8fb224542a9175b6341b6e02d.pdf
    • https://static.usrfiles.com/ugd/9fc8c3_a5fef2abf8e44e3e9b0e6864c800db7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9205e142f72a4937a5e236e07320cc8b.pdf
    • https://static.usrfiles.com/ugd/48d9a1_6319cb0df17a430d8a2e7be6d2c5e647.pdf
    • https://static.usrfiles.com/ugd/ce14f3_20ef9fa135ea400e8abd77160b56862f.pdf
    • https://static.usrfiles.com/ugd/29c71c_2314803c155042dba24477a024de59e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5af9972d0f448f3874f7d3039e8f891.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_off000072e0.bin
f37c052390696a0ad71b4e3a3be06ee1518db81d539fbc26b612a8d2b9805cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E0 5416 bytes
font_01_sfnt_off00008531.bin
38c935edb07a653f75621314e99c159ca2bf322ac532248edb2cfde659f04210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8531 11040 bytes

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