Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00fa7876153f154…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 13:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8253a523dd410fb6a2c04dd02684664 SHA-1: 766c5f39df02bcd7f0cb9383118135a4f27ae8b4 SHA-256: d00fa7876153f1548a862cf62e14b600257e98c527bfdf3501ecbbff2fe75119
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to static.usrfiles.com, which is flagged as a link farm. One critical heuristic identifies a malicious redirector link to 'ttraff.cc'. The document body, though partially corrupted, contains text related to 'progress notes template' and the malicious URL, suggesting a social engineering lure. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=progress+notes+template+for+counseli
    • https://static.usrfiles.com/ugd/b8c837_e26fdb7c845846f9941cd61456e8736b.pdf
    • https://static.usrfiles.com/ugd/0d2908_1c1c851bf4214725ac1d98bc7bcfef0a.pdf
    • https://static.usrfiles.com/ugd/ab922d_c63a8011e5a44640b3e83b1c4d64d098.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b6be9d1737c4c5db67bd7a8dc720410.pdf
    • https://cdn.shopify.com/s/files/1/0448/0411/2545/files/23722443451.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/nuseruvaja.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7601/files/sonata_pathetique_1st_movement.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4194/files/deepwater_horizon_putlocker.pdf
    • https://static.usrfiles.com/ugd/696b8a_bc3b4b9c74a24c83aae274aafb5d92ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_98e279dc3146423d9d3f09a5c0db0f5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2bf66bbaf7a4b95838343b21e832e35.pdf
    • https://static.usrfiles.com/ugd/739437_57f6b563a2a24ac6b420148231d23c72.pdf
    • https://static.usrfiles.com/ugd/c068f8_9d634aa33f4c46f9a6492360a9da4222.pdf
    • https://static.usrfiles.com/ugd/0d089b_9458acbc9afd4f30baf2ce8c84b1849f.pdf
    • https://static.usrfiles.com/ugd/6924eb_ed4017d7292541fbb97dd1c9322c9b74.pdf
    • https://static.usrfiles.com/ugd/99965f_ed834422d1e74dfc8299e81fa878ebaf.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_off000065f8.bin
cee028ee6eac6b3f0ebf8be14a2f72dab045fd2e0094b90a3e8144b98ef685fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F8 5336 bytes
font_01_sfnt_off0000780d.bin
48fb5b07ccc79d92a228a2aea6b3d02864a80d789eaf3c554adab14c70ff05bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780D 10200 bytes

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