Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c9e8c51f5c03f7…

MALICIOUS

PDF

58.2 KB Created: 2020-08-29 07:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dda7b27effa506edc57866ccfe7fdd3 SHA-1: 7fca14c1a82590b61610e66e93165ad040e0a300 SHA-256: 23c9e8c51f5c03f7d3ad941b6f5ca1e5c5eea209b90db5241f41124117adb5d7
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary intent is to redirect users to potentially harmful content.

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=lotro+isengard+leveling+guide
    • https://static.usrfiles.com/ugd/b8c837_3a1035ac50134c5da3e49d72c27d05b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_265f266e688f4bf7bd1c5f8275d824ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_07afa77f3e634e66b134aafe6a3cc6c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bc1ede77aa94822997b17a2ec2f8ec1.pdf
    • https://static.usrfiles.com/ugd/b8c837_181913515b314ee7903a36ec8fd94bac.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/12884226727.pdf
    • https://static.usrfiles.com/ugd/b8c837_03cd2da1f9fc42399650b944f5b7e15d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0386f3b8c84d4403ae92a649a43a33dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_5671c48fa6b54474b557c66f84927911.pdf
    • https://static.usrfiles.com/ugd/b8c837_d432e32bd3b54e0988582ef2b3f4adce.pdf
    • https://static.usrfiles.com/ugd/b8c837_5da0f5f08b494a7cb7f3a9d0747fe9c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_f190770c6c074c80a9063f0f03d98476.pdf
    • https://static.usrfiles.com/ugd/b8c837_d76afc95570843bbb83e292015836584.pdf
    • https://static.usrfiles.com/ugd/b8c837_360ba4087b444a88b9bac8fafcf6f441.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009793.bin
4f8ddfccf1100d73c43e2891f0c117ba31639646091cff06802f6e576dace647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9793 4876 bytes
font_01_sfnt_off0000a839.bin
2d66571b8eddc20529639eb6f5c3381ba7f5508978665d5b9fe2ee6e85b9338b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA839 11668 bytes
font_02_sfnt_off0000cdbf.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 4324 bytes

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