Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d805bb42fa806b…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 21:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a06b78f025ad99e38edf147d4de51e SHA-1: a42e137473b82e094ba8ab6cf7532bb69318e99c SHA-256: b0d805bb42fa806b73a463d369ab56c0a6bc0d7d68468d918655408e052f3e5b
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a high density of external links, characteristic of a link farm. One of these links, 'https://ttraff.com/wix?keyword=coherent+g+100', is identified as a known malicious redirector. The document body contains garbled text but includes the same malicious URL, suggesting it is the primary lure. The file's structure and link distribution indicate a probable attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=coherent+g+100
    • https://static.usrfiles.com/ugd/81d6a4_0129639d26a74735b726fb1e58260a67.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3ecb5f568d348a5bf67f3a8bbd591df.pdf
    • https://static.usrfiles.com/ugd/db1da1_c6c53fc4e29045c19436bb0470a74230.pdf
    • https://static.usrfiles.com/ugd/086daf_75ad209336ee480ead03ec4da8c29d21.pdf
    • https://static.usrfiles.com/ugd/b8c837_042db4c71278417f95a5e63d6f565598.pdf
    • https://static.usrfiles.com/ugd/b8c837_308bbcb111da4e6ebd05f5c33c41ef21.pdf
    • https://static.usrfiles.com/ugd/b8c837_b04b151de58545ecbe6dbab3f5d30991.pdf
    • https://static.usrfiles.com/ugd/eda9ba_a05349deba2b4e21a4c2f600855fad14.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_d8d8d95cfa234bb09c8d88bdd0524264.pdf
    • https://static.usrfiles.com/ugd/76de1a_7401561f73084995b2a8b5c75ab863aa.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_db31451e0db648b4b3673dec1ef7f33b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cb0cda1480f47419fa40babc8d9a77b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffa8688089a64fd181585a1459adc7e0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000548c.bin
97c2b2e40c1385b4481fda1c9b3ae017bab0cd090847a61954886acf943b7a13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x548C 4032 bytes
font_01_sfnt_off000062fd.bin
afbce50c36da20880923a7f6edc184489977badc4332095c378e1117e776cc03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FD 4628 bytes
font_02_sfnt_off000072c5.bin
0d4f616293b4989426c09c626ecf0f7e41264e73cebe23511c2dfa529c828540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 11520 bytes

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