Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1d0aeadda482fa…

MALICIOUS

PDF

36.6 KB Created: 2020-09-12 23:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0037b8c60a6b2a58dbb7203e3e9814f0 SHA-1: bc4f9658a25b24d26f291e906fc40227178e3775 SHA-256: 8d1d0aeadda482fa212d1727167bbc0a5e7f2c50f4ec66bd06a28a5af7e497e2
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, disguised as a trampoline instruction manual. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is a high-confidence indicator.

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.ru/wix?keyword=sportspower+trampoline+instruction+manual
    • https://static.usrfiles.com/ugd/271e65_ea83082235774ebe9f4bb9345a536b59.pdf
    • https://static.usrfiles.com/ugd/eda9ba_b5e7f6498d4c487c84d391ad72eb154b.pdf
    • https://static.usrfiles.com/ugd/70c1f8_83b81b49473847c49428beb46edf8686.pdf
    • https://static.usrfiles.com/ugd/4d6844_d24a29d27f8e4acb8a5784c4ad151c76.pdf
    • https://static.usrfiles.com/ugd/8127dd_244a66925a3448049d48e1da8ccc1b6f.pdf
    • https://static.usrfiles.com/ugd/bf650e_b338ec9506a64d49b799482f2a8f90d4.pdf
    • https://static.usrfiles.com/ugd/d9f7b5_8fb7f80c613f4ee0839d870102b3dfee.pdf
    • https://static.usrfiles.com/ugd/a1fb72_00e6f6072f3043428573cb04169fb983.pdf
    • https://static.usrfiles.com/ugd/86319b_03885813eff8403c8fafc353b8648231.pdf
    • https://static.usrfiles.com/ugd/ab059d_02d004359fa74ac88c6d9063fc102b04.pdf
    • https://static.usrfiles.com/ugd/aaaf79_e45d8f63a10c4dcc944ee3c91db2b070.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_577645c47bc44421aa7546c01994a75f.pdf
    • https://static.usrfiles.com/ugd/948cea_772500dc4ec34c18b757eba7fcbd538c.pdf
    • https://static.usrfiles.com/ugd/110ef3_914506de73a54e7bbd942dcdd7839444.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_off000047a3.bin
b8a3c1a6fda908c31587dbc4f9e0549f5922e8f8787379de8139b994590a1fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47A3 5276 bytes
font_01_sfnt_off0000598d.bin
b3049eac9c173712ff00ddf91ce6331100d1fac3a7bc87adc8aedc70d449f690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x598D 13984 bytes

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