Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b69f795cf7ce60…

MALICIOUS

PDF

46.3 KB Created: 2020-09-01 07:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82b0295c0bf5b45f0ca487b0a5cde1d3 SHA-1: 51487d82b84ea2b1ec337b5494498f10aa75b0f8 SHA-256: c6b69f795cf7ce607c5127d682b697f173e7830d380bca90279ec8018981785a
120 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, which points to 'https://ttraff.cc/wix?keyword=electroscope+worksheet+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links. The document body, though heavily obfuscated, contains a reference to 'electroscope worksheet pdf' and the malicious URL, suggesting a social engineering lure to drive traffic to potentially malicious sites.

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=electroscope+worksheet+pdf
    • https://static.usrfiles.com/ugd/d5415a_0fc42f60afbe412384c01e91a0eb8686.pdf
    • https://static.usrfiles.com/ugd/e02969_4bc52e709cb147be9ec51d31a9c71810.pdf
    • https://static.usrfiles.com/ugd/b8c837_594e62a26def4f958d9c5a3b23c604a4.pdf
    • https://static.usrfiles.com/ugd/09273f_b7e1b095049a42398258901c37bef5d6.pdf
    • https://static.usrfiles.com/ugd/0f5b72_56ea2dc729564e2d94c3ddb8e3a90e48.pdf
    • https://static.usrfiles.com/ugd/9374a7_99cbb111baaf4cb0bff90cfa05918c4a.pdf
    • https://static.usrfiles.com/ugd/26938b_b0c119c0bcbe4a63831afa2933b181ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_c31ce49a0a824c0f8d57fbc53cc4e974.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b35804b4e1b42b0b027bcbe58865553.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/analog_to_digital_converter_practical.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/75077005370.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_off00007380.bin
11c66c15d5e8316f3dce7d826c3c972873382f748f28b4cfe9819f1923eac3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 5148 bytes
font_01_sfnt_off00008516.bin
931717a20de90faa11bfc6bee08bb78fd19a48a6a15e128abc93b2967a8f7ca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8516 12236 bytes

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