Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c8d3a4fa0ef363…

MALICIOUS

PDF

40.4 KB Created: 2020-09-12 11:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00577304e50add5354d6922115c7ce4c SHA-1: c1e442bc53a04f3b03bf4ba50f12f7c293dfdc66 SHA-256: d5c8d3a4fa0ef363d5e593b029da4dc1251550cd818d0aa4d77164651f48bae3
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.club/wix?keyword=counter+strike+online++pc', is presented within the document body, suggesting a social engineering lure. The presence of multiple links, including one pointing to 'static.usrfiles.com', indicates a link farm strategy to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=counter+strike+online++pc
    • https://static.usrfiles.com/ugd/253000_36e54cd7991544719c5e76f636a5b3fa.pdf
    • https://static.usrfiles.com/ugd/f46427_9795023c8b6749269b485856a4797a63.pdf
    • https://static.usrfiles.com/ugd/18574e_94fc5e2b35c049c1995af57cb5ca8146.pdf
    • https://static.usrfiles.com/ugd/a12125_b6c175f397dd46afaebdac809670cdb9.pdf
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/13728648894.pdf
    • https://cdn.shopify.com/s/files/1/0432/4920/5405/files/lazozopetod.pdf
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/all_hollywood_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/mammoth_mountain_10_day_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://static.usrfiles.com/ugd/c83fdb_7ff0d514bb8a4957bd570f40a0a06334.pdf
    • https://static.usrfiles.com/ugd/d8e941_1664b44b2eb843cd842d27282fbc76cb.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_off00005dfa.bin
d9cd7a8b5cf3f6e501cbca6ce2f241738d236980aa9fc7a12a6db0f6c59607a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFA 4684 bytes
font_01_sfnt_off00006dfb.bin
0f93c66ebffc97c5dad293159d2d65809e6f33ddcab6eae8533a6f4e998cf83d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFB 14384 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.