Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0efa4267be0c1d…

MALICIOUS

PDF

40.3 KB Created: 2020-09-02 01:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a777880e707378b1f2ff502bf740c7df SHA-1: 6b15e541d8732156b738f4cc0642eb6d31290c6e SHA-256: dc0efa4267be0c1d838e30a04c738e292268198fec6c15f30b8a5781b1505689
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a 'SE_CLIPBOARD_COMMAND_LURE', indicating it instructs the user to copy and paste content into a shell. Additionally, it hosts a large number of external PDF links, with one pointing to a known malicious redirector. The document body itself contains obfuscated text and URLs, including the malicious redirector URL.

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.com/wix?keyword=eclipse+c+for+ubuntu+14.+04
    • https://cdn.shopify.com/s/files/1/0462/4154/6394/files/auschwitz_private_tour_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/8962/4224/files/pesomelesibipano.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/ziwiniziximuxuguwezi.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_563be66d70454ed3915f2a789d52cd2a.pdf
    • https://static.usrfiles.com/ugd/e4ff69_28e90aeadf394764bde520baeef70e4f.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_45e424bf1bb14ebdad2476fdf3b3ea84.pdf
    • https://static.usrfiles.com/ugd/0a593f_4fb4ce193b8e4ad0b435b6580e18a1c7.pdf
    • https://static.usrfiles.com/ugd/87a178_22f45dc25acb4a8186b2a8df7d699494.pdf
    • https://static.usrfiles.com/ugd/850f07_f0eb403dabda44f4aadec7290757e6c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_15b571ccc55447868505cbab9e834b35.pdf
    • https://static.usrfiles.com/ugd/b8c837_83e7b438a15d4094861e66aa57458834.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d93da4b6e9e4bac8ba8ce9981073a82.pdf
    • https://static.usrfiles.com/ugd/b8c837_f51b578cdb8a458c946aa13a31110476.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_off0000601d.bin
5af47bbe3c515d384c0ddf06c0eb22871607d4bb2c2adb285806a31fd77a71e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 5208 bytes
font_01_sfnt_off000071f4.bin
7fb5acc9d501b251c8ec799627aaa4b79df613be6dc25f05c7f4c2ce098c2972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F4 10288 bytes

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