Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb27579226d09043…

MALICIOUS

PDF

47.8 KB Created: 2020-08-31 23:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a08a89521be1b7db22982349662d332e SHA-1: e597f211a94ca90db1e0f40d13477fdafbcd7415 SHA-256: eb27579226d09043635ecc2cf62e634d1c6ee1b5cc00ecb35053910df92aacd2
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=tenant+agreement+contract+template'. The document body, though heavily obfuscated, appears to be a lure related to a 'tenant agreement contract template'. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document. The primary attack pattern involves tricking the user into visiting a malicious URL disguised as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=tenant+agreement+contract+template
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/wipefezomakun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0836/files/64269983798.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/analog_multimeter.pdf
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/hiv_haart_treatment_guidelines.pdf
    • https://static.usrfiles.com/ugd/1849a1_5228353d6ca041808e0c65f1ae85100f.pdf
    • https://static.usrfiles.com/ugd/538d67_a175c715c11044b697397a48273c9891.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf551a7e46aa44c3a958e961fa977820.pdf
    • https://static.usrfiles.com/ugd/b914b5_e2834dbc6851417987563540f6de9038.pdf
    • https://static.usrfiles.com/ugd/80c1db_80f54b442e02418da8dacbf4c307d981.pdf
    • https://static.usrfiles.com/ugd/90423f_346f532665c84132b4cb55f12239b7ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_1acef00418f945289c9673f17a98421f.pdf
    • https://static.usrfiles.com/ugd/575363_420d13fb07a84fd2a9dce7b851387395.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_off00007f26.bin
013fed5f04bf901e201c13a9765229166d011008dd8907ca2e60d4d71638c40f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F26 5024 bytes
font_01_sfnt_off0000902c.bin
9b04db018c0d59838a37f375ee176dff712c1d692169a46330ab2ef39ae4dae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x902C 10080 bytes

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