Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cb3c31276f16f7…

MALICIOUS

PDF

55.3 KB Created: 2020-08-30 07:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68c0fec2d44a2a3c3798279d2b14aad2 SHA-1: b99fcb61f00d46f5656095c5dcf706877486e4b2 SHA-256: 26cb3c31276f16f72d71eb19a26b136bd9fa8fea71588f732ce657bcf62bb188
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=clean+9+side+effects'. Additionally, another critical heuristic indicates a PDF link farm with numerous external links, suggesting an attempt to distribute traffic or obscure the malicious destination. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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.ru/wix?keyword=clean+9+side+effects
    • https://static.usrfiles.com/ugd/b8c837_49773783d9b1483f950c79338b3366ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_4cad3769a64b436eaf0587d4bffad57c.pdf
    • https://static.usrfiles.com/ugd/76de1a_d982daccacad4f11a88fe525496dd9c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_58c7b4841bae4ed893488f877f87e318.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1318/files/14995028304.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6064/files/99990525222.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/force_git_pull.pdf
    • https://static.usrfiles.com/ugd/136d07_c6c08da763ed46348a42ea3507a33297.pdf
    • https://static.usrfiles.com/ugd/9e14ca_f1d167030a6146d8a39d5c74240bc75e.pdf
    • https://cdn.shopify.com/s/files/1/0440/7692/5078/files/9974189967.pdf
    • https://cdn.shopify.com/s/files/1/0449/5409/1675/files/wizard101_sign_up.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/31995327637.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_off00009b4c.bin
d47c9df9acb92cc027f453be000ea54bb85ecbdf0f29b7c94080af9972de2d84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4C 4980 bytes
font_01_sfnt_off0000ac4a.bin
ff835736efcc446e8193fc9662017e0f8427fc59b00c648f7c250339ed8a7ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4A 10560 bytes

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