Malicious PDF — malware analysis report

Static analysis result for SHA-256 5687b00abf44177b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 11:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aed39051cd26fba7a3b65e3d7051146c SHA-1: 75df730b3992e40b9930e4a42ade8c4b35f1817b SHA-256: 5687b00abf44177b92625480884b7e93195ebc3d304cdf3331cdb431ac361a4f
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to the presence of a link to a known malicious redirector. This redirector is likely used to obscure the final destination, which is probably a phishing or malware distribution site. The document body contains garbled text but includes the URL that triggered the heuristic, suggesting a lure related to 'music trivia questions'. No scripts were extracted from this sample.

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.cc/wix?keyword=2000+music+trivia+questions+and+answ
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/39389608889.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/3d_zu_stl.pdf
    • https://cdn.shopify.com/s/files/1/0439/3687/4651/files/52055777309.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/calculus_james_stewart.pdf
    • https://static.usrfiles.com/ugd/b8c837_4891e5af8b2848b594073f2fefbcc7f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c45879901e34e7a9171cf37e6f36f16.pdf
    • https://static.usrfiles.com/ugd/b8c837_c257fd55316a4326a549f91f86fb7655.pdf
    • https://static.usrfiles.com/ugd/0a052f_5b77caf401604c468e76332ca37a1e64.pdf
    • https://static.usrfiles.com/ugd/63d3ad_623b8ba2c13648b7baff6cffc22deb51.pdf
    • https://static.usrfiles.com/ugd/b8c837_a749f06352934335ae43fd715734e904.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e4f0ebc1dc04cd281f6761e5a259a00.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_off0000603f.bin
33b7077d941c8b51e80afbadb0d2f28fad7ef07cd99f550a0845d941f1bf7668		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603F 5512 bytes
font_01_sfnt_off000072e7.bin
a31118e8921bd28454c591052ba79f6e1d4c54075f12d6b93c4d7e0238a1ffc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E7 10648 bytes

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