Malicious PDF — malware analysis report

Static analysis result for SHA-256 46675cf23083d959…

MALICIOUS

PDF

47.3 KB Created: 2020-09-07 22:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2a8b63ae1a06c75e5914cd41c3919ad SHA-1: 6cfaecededc5aa140ac82ca30ee0e03ec91eec3d SHA-256: 46675cf23083d95937a172b436967f51316041ed223bbffc39e249fcaaae2434
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is presented in a context related to a movie title. This suggests a phishing or social engineering lure. The PDF also contains a large number of external links, many pointing to static.usrfiles.com, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

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.me/wix?keyword=disaster+artist+movie
    • https://static.usrfiles.com/ugd/9e53d4_fdfe25d24530488281b7fd1006d9df4c.pdf
    • https://static.usrfiles.com/ugd/3f80ec_d4c6eb457a07474f991b89366c4665a2.pdf
    • https://static.usrfiles.com/ugd/bd7df1_4abdc7c17d184a20a34c2ce67f975352.pdf
    • https://static.usrfiles.com/ugd/b463f2_90fecbd7a6f6434498ddcd2d87c94f14.pdf
    • https://static.usrfiles.com/ugd/097bd5_00068b5e4b5d41c4b6ec4dd1f6c98ebb.pdf
    • https://static.usrfiles.com/ugd/b65acf_86a2338ce177451fa9b3d961806948d8.pdf
    • https://static.usrfiles.com/ugd/e5a943_36deb677cc004a598ef8ae772b07a862.pdf
    • https://static.usrfiles.com/ugd/de60da_6883ccd982d949d8985b780bba8ba33c.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5dd5b56f6ec452c817aecb991107b83.pdf
    • https://static.usrfiles.com/ugd/e643da_e7ec677ffeb4449bba47b0ae9e907d76.pdf
    • https://static.usrfiles.com/ugd/590778_950a796f94d94dad9822c559db69ca5c.pdf
    • https://static.usrfiles.com/ugd/625844_68c4990aba714f12b1d488258353706f.pdf
    • https://static.usrfiles.com/ugd/185c00_c5c8c6c0412c400fbe4479d0fc189e3c.pdf
    • https://static.usrfiles.com/ugd/4cfbbd_eb1d889ba09f4d3da6022c8389bd9cc3.pdf
    • https://static.usrfiles.com/ugd/c0a468_acd69dc88b53494eafc4e95202ffb885.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_off00007b79.bin
cb134b6588feaf95a8d6f8c09f8cbcbced6b029e6af8a0f688694887bff9db9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B79 4856 bytes
font_01_sfnt_off00008bf2.bin
71042710172b151db6ded2d8d73b28ad1ab13d328e3343d7d7782751dc804e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF2 10832 bytes

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