Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc28f4afee2facdd…

MALICIOUS

PDF

51.8 KB Created: 2020-07-30 10:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9851c0917e5b24f28d5f83526a13710f SHA-1: ddd4e2ac9b8888230e6d2e2667fd9e5e1ab3c8ad SHA-256: cc28f4afee2facdd8704dfe92103a0b8642bfe509203504aa01ad9502740cb98
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a significant number of embedded links, many pointing to Shopify domains, which is indicative of a link farm designed to obscure the ultimate malicious destination. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The ML classifier strongly supports the malicious verdict.

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=me2354+automobile+engineering+notes+pdf
    • http://files.nybellhouse.com/uploads/1/3/2/3/132302963/rutunejo.pdf
    • http://files.lagunaniguelcarpetcleaning.net/uploads/1/3/2/3/132303382/b9fe58d9a.pdf
    • http://files.emlteam.com/uploads/1/3/1/3/131383247/pogexidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9072/3487/files/sekafujujigibekugaxes.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/43775487563.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/dipasataxowobew.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/86442878504.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/pepezebenerijaxiwada.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/makuluwumulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/61263766847.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7138/files/35531731324.pdf
    • https://cdn.shopify.com/s/files/1/0429/3676/2527/files/13774569122.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijob.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/
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/pepezebe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b9d.bin
4f0841db1d2edfb0b5c0bfc7bd5db7f55b0ab954ec7aaa49bb44d4ea40680a58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9D 5896 bytes
font_01_sfnt_off00009f8f.bin
8222bc28387eda7ff5444396838e2a4497d109eff0d87e23d2ddd4353f7f1ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8F 10220 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.