Malicious PDF — malware analysis report

Static analysis result for SHA-256 2586fe879e5f23aa…

MALICIOUS

PDF

36.7 KB Created: 2020-08-01 12:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9073bd6a83129ef0b99b6b944d81d179 SHA-1: 2e9ef1606932da5949589b27661003b0f6b15978 SHA-256: 2586fe879e5f23aa04feb812acc67329afb58d3e10fd5a80671fc06164daf3d8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=label%253A+39+id' which is likely used to redirect users to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for malicious content.

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=label%253A+39+id
    • http://files.edibleexpression.com/uploads/1/3/0/8/130813765/pavafuruniko.pdf
    • http://files.darknessisfalling.com/uploads/1/3/0/7/130739158/xowuragotesoteves.pdf
    • http://files.nonstopinterior.com/uploads/1/3/0/7/130776416/ritures_mukejetemu_ripepoduwokij_zuxolitidex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/75323284337.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/40406763311.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/xozepanix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/60683513879.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/env_file_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/60765044439.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/zimadena.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/24596218752.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/49391207404.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5266/files/36592071670.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0836/files/86739716755.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/datelokat.pdf
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/7630598061.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_off00005242.bin
b716b2249a01a4377f99230e22d90c3a3877e33f984f0a6fa36f86c1dae8b43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5242 4996 bytes
font_01_sfnt_off0000634b.bin
9aaca5e28030c3e8aba188863dadac8ddf1f1137627540ccdc8def55310f0d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 10272 bytes

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