Malicious PDF — malware analysis report

Static analysis result for SHA-256 9164fc8cbd83b44d…

MALICIOUS

PDF

53.9 KB Created: 2020-08-30 02:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f959220c6856d7cdbf2e4ca5827e4383 SHA-1: 7a63df3b0480cb77329fcae6eb21d3b7e74d79e3 SHA-256: 9164fc8cbd83b44d0e033f9257f952fc6fc48d4a009a946e6378042c0f428cda
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a link farm and a direct link to a redirector, disguised as a download for 'God of war 3'. The primary heuristic indicates the link points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the target URL and appears to be generated by wkhtmltopdf, suggesting a programmatic approach to creating the lure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wix?keyword=god+of+war+3+download+for+pc+full+se
    • https://static.usrfiles.com/ugd/e42ee3_9a4a4ae655ec4efab5c865446b7e2271.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_8ef1136b8ca74c9cb8173f8c3a74dd4a.pdf
    • https://static.usrfiles.com/ugd/253000_18147c0b40af4ba6aee7257effcbead2.pdf
    • https://static.usrfiles.com/ugd/3aee12_20a4209281d2483c95bb86e0962997c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ba0899f1c3b4c5b88aad73add6155e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_165fb73706fe412c814ff61381b9a175.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_ba154473300743f58ba9d4c4d81a6eda.pdf
    • https://static.usrfiles.com/ugd/b56239_30042b0174734f78bac04bc399026da1.pdf
    • https://static.usrfiles.com/ugd/dd4472_fe205b3a69bf42ffbb0f6eb2e26daf5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3f014b91b224401a31da0189d354b67.pdf
    • https://static.usrfiles.com/ugd/913720_d57c6a354db54e00b5cff558215f20c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_c600590d24314c688e96f21fb110b748.pdf
    • https://static.usrfiles.com/ugd/b8c837_a35a52cb868b4ccfbcf705065ad8575a.pdf
    • https://static.usrfiles.com/ugd/21e6f2_5ece1e2b89b64fe7bff87cbb15d4d378.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_cc8164a545b04a318359a280fa49ea17.pdf
    • https://static.usrfiles.com/ugd/3f80ec_f5cfd45aab5b42fd82dc4e357a62d600.pdf
    • https://static.usrfiles.com/ugd/f0f215_81860032707b4b559ba24d8bc117bdca.pdf
    • https://static.usrfiles.com/ugd/10a4aa_486ac14edf27436797efb566ecbbcaf6.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_off000080e2.bin
735c196fb54a2c3cf7d99c5df8bc316569ab3512fb8ad0cb9851bb3b64467614		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E2 5188 bytes
font_01_sfnt_off000092a6.bin
c2102c34c3e5b030a72a075115c9c341264e9e1ff101d254991219509d265751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A6 12948 bytes
font_02_sfnt_off0000bc55.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC55 4324 bytes

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