Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a0bd610179eae5…

MALICIOUS

PDF

44.3 KB Created: 2020-08-29 15:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e300bae65a76c9700e87d94da6fc03ce SHA-1: c3319743d3a5b0b73e392bf709f641807b605e93 SHA-256: 33a0bd610179eae59f26e0df7f70c38654433d894c0117eb7f54bdaee9552f91
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link. Another heuristic indicates a lure to install a browser extension or update, and a callback phishing lure is also present. The primary malicious URL identified is https://ttraff.com/wix?keyword=mr+sawdust+pdf, which is likely used to redirect the user to further malicious content.

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=mr+sawdust+pdf
    • https://static.usrfiles.com/ugd/b8c837_52c0aabd9ede4b29a95bcca3a3c3fed3.pdf
    • https://static.usrfiles.com/ugd/0d002d_2345f36ea3224ad68647eb8edff9e54a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4364b02b69644331862740040b39d5e2.pdf
    • https://static.usrfiles.com/ugd/8ab72e_67398b8c2ce445a190cb2ab5bb924b10.pdf
    • https://static.usrfiles.com/ugd/b8c837_520e0afa70a04556820ab16d798d558c.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd5ef37642bc4873ac13c8510e4a1d63.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1ecf845b4e84769b685920271feb4ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_85fa86e91761456dbce0eb4ed1354b05.pdf
    • https://static.usrfiles.com/ugd/b8c837_7512fdf9bc5245d49cfd1570251fa20f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ef4a914d18b43e38ab06a1d212f65a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7566470a67f4d2f9b2a0e6f8c7a8f65.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b583fcf5f8a4e5b88a87041d508d6a0.pdf
    • https://cdn.shopify.com/s/files/1/0437/3744/8609/files/5878570962.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/2284843555.pdf
    • https://cdn.shopify.com/s/files/1/0451/9713/1925/files/check_font_size_in.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/nudemameximobebamatuno.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_off00006ea9.bin
b317a7f4c8c04f25ae2a12de353973d0aa10004d14bcc6eb56b185c907834402
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 5100 bytes
font_01_sfnt_off00008025.bin
5d25a092d99aa8608816d790fe6171386b4a82ab1182c13cef96fe38d0cf1daa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8025 10564 bytes