Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67758fa1304bb7b…

MALICIOUS

PDF

45.0 KB Created: 2020-08-30 09:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b5dec63564d2d8a358ff637ad588668 SHA-1: 49a82199a2ec2162954a863f3cee49444b05934a SHA-256: f67758fa1304bb7b99b6c834618d3d47beb80cee55c8e8b749ab1fcb82979574
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the URL 'https://ttraff.com/wix?keyword=5e+frost+worm', which is flagged as malicious. The presence of numerous links suggests an attempt to lure the user to external, potentially harmful, content.

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.com/wix?keyword=5e+frost+worm
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/delete_branch_git.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/69080776381.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/gefofaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7820/6111/files/76054399410.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/84755120406.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/brand_identity_guidelines_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0436/8846/0441/files/kotor_2_cheat_codes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61403973964.pdf
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/vejizume.pdf
    • https://static.usrfiles.com/ugd/63022f_4d2004a2b1dc41f38b7b27af97ce23f9.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_471345c03cb84c3eb23998f9dfee43d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_04eb9e0fcc4344748837390be136e3eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c9b3ba46b3143a5a3cb622ac9fb4cc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_924976c92036418caa81c284af223ef3.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_864f25d4c14a4fe0ac868df531e7a4bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_c84048ecc36e4063b4268c359c680b16.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/
    • https://static.usrfiles.com/ugd/b8c837_04eb9e0f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007122.bin
551fec0e1cb8f8e3a3e93fbe33333e9eab4896388a0687239790eea3bad68c54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 4792 bytes
font_01_sfnt_off00008171.bin
890eb17c6845192a3b50b8dbc84cc8d596f5f1b75d3b1432259a64fab8b62470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8171 11664 bytes

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