Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbccfe0db995fba9…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 16:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1468ecbd348afdbeb0ed1898fabbb863 SHA-1: 0404f0365d9bbdd4de3bf3d03d5c15b76734e2e0 SHA-256: cbccfe0db995fba953f303e28feb94fcbdf993ca323cdadf1588b05c8e565c95
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many pointing to external PDF files, suggesting a link farm for SEO poisoning. One prominent URL, https://ttraff.ru/wix?keyword=ccna+1+answers+chapter+2, is identified as a malicious redirector. The document also contains instructions that lure the user into copying and pasting content into a command-line interface, a common tactic to execute malicious commands, likely to download and run a second-stage payload.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=ccna+1+answers+chapter+2
    • https://static.usrfiles.com/ugd/2ca09c_45b0269490df46679341b0b751a58d56.pdf
    • https://static.usrfiles.com/ugd/b8c837_d99d9feb1f144681b9db795ef12f9348.pdf
    • https://static.usrfiles.com/ugd/e2c250_57640106010449f59213f3075e033923.pdf
    • https://static.usrfiles.com/ugd/625844_fd55a94e25784b64a5ac24fddee39638.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca7214c10c1b47438db081708e9ff2ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bddd9dbab824720ad073600196511af.pdf
    • https://static.usrfiles.com/ugd/e2f197_fc0db8873dc54531b7d75b7032fddca8.pdf
    • https://static.usrfiles.com/ugd/856cea_f4b85389be364655ac16734bb9631853.pdf
    • https://static.usrfiles.com/ugd/fbccce_95ad0061adff42fc9d475d01e99a0b9b.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/physics_james_walker_5th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/billy_mays_here.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/12764604603.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_off00006b51.bin
989d7d9b8240cdb37b2d541f897e87c451c119af6dd8eba8f384504611ffa82b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B51 5172 bytes
font_01_sfnt_off00007cfc.bin
9671d7f0823dd7f15b314d55988de1d33fddea9219fb5ec21146120707b60440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFC 10052 bytes

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