Malicious PDF — malware analysis report

Static analysis result for SHA-256 44076048b900123e…

MALICIOUS

PDF

47.5 KB Created: 2020-09-02 00:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dd8bd8835d447acc20df0a62c224cbc SHA-1: 4dc450f34d22613410775cabc10c5857bfb815dd SHA-256: 44076048b900123e10cbab5b8d0d7d8716ee4002008c19e3e1497a8a302eec2b
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and references a "Colonization of Africa color sheet", suggesting a lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded links to 'static.usrfiles.com'. No scripts were extracted from this sample.

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.ru/wix?keyword=colonization+of+africa+color+sheet
    • https://static.usrfiles.com/ugd/9ea91e_aefea73fd05b4844955d8434cf0a04d0.pdf
    • https://static.usrfiles.com/ugd/dc98cc_41c526b6bd224d62a1c7503dcfcec6e0.pdf
    • https://static.usrfiles.com/ugd/65b209_7cfa04890e4f4835b44d73b8ed386158.pdf
    • https://static.usrfiles.com/ugd/22bf55_d296bcc54864456da5d457cb6058af0c.pdf
    • https://static.usrfiles.com/ugd/ba3095_0fc7ec2ac1cc4f06948641c10942bccc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b03e46931a834a4abe0d87883e5c7738.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4b7d39b72a64b3a9ebd791606d268f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7be3290c59e42d39fbaece658f1d0a6.pdf
    • https://static.usrfiles.com/ugd/fd3290_7b07570e45954b11ae7cdc122907bc8d.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_71999fdbb7494ef1b993d3efb8fc32e3.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_f99af7a3dda64d869f7b35cecc5f2057.pdf
    • https://static.usrfiles.com/ugd/b8c837_f69efc7993d64722bb3375252cf638f6.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_off00007e4f.bin
86ecfe95ed325c815d964c37d78ff2dc00cbd849de30a078e64b5b1d82c867b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4F 4924 bytes
font_01_sfnt_off00008f0c.bin
586b158e0031d83661db74815deb5b5369ecceab47672fe26897deff8176b8f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0C 10076 bytes

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