Malicious PDF — malware analysis report

Static analysis result for SHA-256 28423f62884e73de…

MALICIOUS

PDF

47.2 KB Created: 2020-08-31 07:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92b87db1b2b27b7aef0e9d22e3697c3e SHA-1: bc5ad3baa16925765acb9ca44f5b523703a24ba5 SHA-256: 28423f62884e73de3e4bd87f4cd81915ba8e3f65bf1977c04eac87678dcd6ce7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a critical heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/wix?keyword=wondershare+video+editor+full'. The document body, though heavily obfuscated, contains references to 'Wondershare video editor full' and the URL, suggesting a lure to trick users into downloading potentially malicious software. The presence of a large number of embedded links, many pointing to static.usrfiles.com, further supports the SEO link farm heuristic.

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=wondershare+video+editor+full
    • https://static.usrfiles.com/ugd/2b25b5_08056d00effa4374af91ce9d8becdede.pdf
    • https://static.usrfiles.com/ugd/353d00_f9fcd848de2b47d2b28b3e73b93947de.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63ed30d3bb74fc4b721a7fc51224914.pdf
    • https://static.usrfiles.com/ugd/db1da1_6caa669d0e9d4731b9cb5d67cffec7cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_88cba62e2da04a3b9fda8a00b430dbeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_8684fceb92db480eb5711d996f6d6524.pdf
    • https://static.usrfiles.com/ugd/b8c837_d70c5c6f37024ce0901cfea14c0efcb7.pdf
    • https://static.usrfiles.com/ugd/7ff653_ab865531928741fab84557db93bb9376.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/87622616198.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4412/files/robots_androides.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/autoplay_menu_builder_templates.pdf
    • https://cdn.shopify.com/s/files/1/0451/1688/3109/files/nacte_guide_book_2018_19.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/weather_code_lookup.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_off00006d7b.bin
e6e3d98ca9ac84281b9446deaaa49c099aa16f778fa7c6b15f2ee791d4415db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7B 4948 bytes
font_01_sfnt_off00007e53.bin
57e2440c7be98f80c0aa7cdf0cd0fbe224749e937dce56381146cf9bb1d259e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E53 10420 bytes
font_02_sfnt_off0000a203.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA203 4324 bytes

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