Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4c270ea7b16d32…

MALICIOUS

PDF

43.6 KB Created: 2020-08-02 07:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0185aa2cfb5bdb92bfc0e50f26016ef5 SHA-1: f0a79defe13c28112cd4c7df856a8ad74164a038 SHA-256: ee4c270ea7b16d32605c9a938ca6a667a37f1bd3e53abb428818e0682b3404c5
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a thermostat manual. The document also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to external PDF files, likely for SEO poisoning or to distribute further malicious content. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=rv+comfort+zc+thermostat+manual
    • http://files.thebmbcnews.com/uploads/1/3/0/8/130874317/a4482cab7f82ad5.pdf
    • http://files.myurbanhermit.com/uploads/1/3/1/3/131384081/dolowok_xumewezofolodi.pdf
    • http://files.baileytheatre.com/uploads/1/3/1/3/131380440/2dd9c68d7c8.pdf
    • http://files.backdoormission.ca/uploads/1/3/0/7/130775045/wojubenokug.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9445/files/41624685061.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0440/8908/2006/files/45752235226.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/judakusam.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9658/files/tunavukote.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/wazowunaketuxowolewagi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/40165652968.pdf
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/punokejulutamosugodi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6662/files/35772797656.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2911/files/90007060015.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_off00006c4a.bin
030ad1e4b37cfe8c82a4dd29cf44d44502b2687abc75ac359482dd1bcc8c73d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4A 5240 bytes
font_01_sfnt_off00007e04.bin
7b45026cc2913a067dc9496d4bf21d1891ec246a28caa35fa65a23c5ef830246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E04 10296 bytes

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