Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ffc3b2e79c7f21…

MALICIOUS

PDF

32.9 KB Created: 2020-08-30 20:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e6ecab043b8061d40f7d0bea6ac0de3 SHA-1: 6408844083ff2317690871d3b37ffc516198e821 SHA-256: d0ffc3b2e79c7f216a389e68573b54678ceec34004261ab3eeb2fd26311b6b69
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.cc/wix?keyword=pharmacology+in+rehabilitation', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs, suggesting a social engineering attempt to drive traffic to malicious sites. The primary attack pattern involves leveraging a link farm to distribute malicious 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.cc/wix?keyword=pharmacology+in+rehabilitation
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/airplane_sim_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1400/files/kevivoxenajukumudukebusik.pdf
    • https://cdn.shopify.com/s/files/1/0459/9817/8463/files/sfmc_email_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/fabaluwuwajaviwasuwanag.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d175c591d8d45b98a37a652e5fb167c.pdf
    • https://static.usrfiles.com/ugd/b4a829_31b3aa3dc393438fa56839049d7e8dd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9014f6f1a234e708e17ecb817c429d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_48ec684d3f1248b9b2c7d97761c96360.pdf
    • https://static.usrfiles.com/ugd/dc98cc_1f0c9846db91487eb3356273cbb1233e.pdf
    • https://static.usrfiles.com/ugd/b8c837_42717236b40443d0974665c2105e88a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_570843dfa00848aa8f001642ff081495.pdf
    • https://static.usrfiles.com/ugd/b8c837_86b3e735cce247c796b4d063db64c3de.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_off000042f4.bin
0262bf7beb57de4df123111152cf657e2f10a52338a6f6ff3d703d86cf1feb05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42F4 5276 bytes
font_01_sfnt_off000054c1.bin
6f16b76b757792e395279df6f63c3b62a3427786e4c95983e2d2be541864ea8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C1 10124 bytes

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