Malicious PDF — malware analysis report

Static analysis result for SHA-256 5631a399e45fae1f…

MALICIOUS

PDF

44.5 KB Created: 2020-09-08 23:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f95e8cbc265f99fa468174b472dde70e SHA-1: d66aa8046133eb5f281347ffa2ba7d728dac59b9 SHA-256: 5631a399e45fae1f25734f774a4f27e4ec056465a207040224d020a4e72be33a
160 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=ccleaner++chip+neue+version'. The document also exhibits a 'Browser extension / update installation lure' heuristic, indicating social engineering to trick the user into installing something. The embedded URLs suggest a link farm designed to distribute malicious content, likely leading to further compromise.

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.
  • 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
  • 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.me/wix?keyword=ccleaner++chip+neue+version
    • https://static.usrfiles.com/ugd/8dde66_1ddd181436b749ca8e2bf71680a4351a.pdf
    • https://static.usrfiles.com/ugd/0d2908_11ff11e0894341d19bbb43c109db2e0c.pdf
    • https://static.usrfiles.com/ugd/917232_9e697bceaa3b47ac9a3967c6db96d983.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_3cd8672e7ea04f4dadc1394c39463957.pdf
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/zatabinot.pdf
    • https://cdn.shopify.com/s/files/1/0437/2869/9553/files/guide_gear_boots.pdf
    • https://cdn.shopify.com/s/files/1/0434/2113/9096/files/55616381637.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/pirurolozikutetosapavib.pdf
    • https://static.usrfiles.com/ugd/fef373_23f58d9778804403ac0543e4a63341ef.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_bef70c79cfab4a509933887347d06a57.pdf
    • https://static.usrfiles.com/ugd/834936_0053270bd9c7415db06c85ef8876e46e.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_off00007209.bin
1b0978ada71347713b3cf4455aaddcaca99b53add4a20ae78c87094e6d133876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 4984 bytes
font_01_sfnt_off000082f6.bin
c036776871369912e8876a587d28d7c7b8f89fb1e54cf9b66c962c619e994889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F6 9964 bytes

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