Malicious PDF — malware analysis report

Static analysis result for SHA-256 2323c8938fff7f8e…

MALICIOUS

PDF

42.8 KB Created: 2020-08-12 00:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe72602733c6e3bd19fee0433b900d86 SHA-1: 5fa0a8cc7d9d0e539ef64220002a23ca5d26fa13 SHA-256: 2323c8938fff7f8eeac55bad91b8133c4633d35956664b1b8801caa976bf160b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=can+bus+specification+pdf`. This indicates the document's primary purpose is to trick the user into visiting a malicious URL. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted, limiting further analysis of the payload.

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/pify?keyword=can+bus+specification+pdf
    • http://files.beecityusa.org/uploads/1/3/0/7/130739837/9dc1c6ed2688.pdf
    • http://files.drleeinfo.com/uploads/1/3/1/3/131379692/lalurisig.pdf
    • http://files.rachelelizabethmyers.com/uploads/1/3/1/6/131637854/3676dcc7307d42e.pdf
    • http://files.semiconductorplatform.com/uploads/1/3/0/7/130739971/1387077.pdf
    • http://files.sandpiperonsmithslake.com/uploads/1/3/0/8/130814397/e7c34f063f.pdf
    • https://cdn.shopify.com/s/files/1/0439/1718/1083/files/desagupagizojafinegusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/taxetoto.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/53875618848.pdf
    • https://cdn.shopify.com/s/files/1/0440/3114/8197/files/insect_life_cycle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/62453580221.pdf
    • https://cdn.shopify.com/s/files/1/0434/9673/4880/files/26778154479.pdf
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/nizakezajofokiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/16430926371.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/1968_mercury_monterey.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_off000068cd.bin
34671114422e78cf397b3042fee10a13ca039a427f44be28842be73cb3d56734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68CD 5068 bytes
font_01_sfnt_off00007a1d.bin
498a59fae09992306a93af4df7c4aa12486874cccabdf3aa6fdfcd53b3c71ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1D 10844 bytes

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