Malicious PDF — malware analysis report

Static analysis result for SHA-256 247b04e69301b4fb…

MALICIOUS

PDF

42.0 KB Created: 2020-08-29 00:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a40e600af089855a62567b121115dd78 SHA-1: 7255f7c4c0c3464384fbd4b10f44a9c6ef848b59 SHA-256: 247b04e69301b4fbd7d59ddc9b077ed9645cc6040305009d85fa9cc53def1a90
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Mortal Kombat' and the malicious URL, suggesting a lure. The presence of numerous PDF links indicates a link farm strategy, likely to distribute malicious content or engage in SEO poisoning. The ML classifier 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.cc/wix?keyword=mortal+kombat+stage+fatalities
    • https://cdn.shopify.com/s/files/1/0435/8170/2301/files/geometry_equation_of_a_circle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/53884558616.pdf
    • https://cdn.shopify.com/s/files/1/0436/9452/2518/files/2309173465.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3c80b63c2ef4ff095a3c9af6a0180b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c67ac548abd5477f94ec77f1fc2067fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad486d779b744cffbf4b9b74eba9bf46.pdf
    • https://static.usrfiles.com/ugd/b8c837_718f5aa6ad314dbf956a23250d9ff214.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf4b339f1a4347c79ef99a2861765bba.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a8b7af3c0394051a559d8ba18f394d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_9442942980d449109f7e8df780c43b35.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_off00006604.bin
08edff20fac9c5a061ff30752b962823330a85c7e65fd238e4507cf8a55e45e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6604 5296 bytes
font_01_sfnt_off00007804.bin
1281a5c1950da202ae74aee69b4bf4bee77730757c8d67a145c43571d9b8803a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7804 10392 bytes

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