Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18c56dbb040f303…

MALICIOUS

PDF

77.8 KB Created: 2020-08-01 22:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9468a417d7f5d6aec90669ca47429b65 SHA-1: 4f025ebbfafd266b4d301edc84c4f5af4247d915 SHA-256: c18c56dbb040f303b31a14168ec60865a5125d01bf711e884d7a749038b18a31
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on CDNs. One of the primary links directs to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be part of a link farm strategy to distribute 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=one+tweak+new+vegas
    • http://files.naturalstrandsofbeauty.co.uk/uploads/1/3/0/9/130969206/mimoje-turoz-politem-milukasiraxuraz.pdf
    • http://files.birdingmoments.com/uploads/1/3/1/3/131398141/2827415.pdf
    • http://files.jfrenzelenvartist.com/uploads/1/3/2/3/132302863/4cd09915.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/goletonamomonas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/17784857129.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/womofu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/alienware_alpha_i3.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/jokokesonazapagigapipunep.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/how_to_screen_share_discord.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/42251934654.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/5663567686.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5602/files/88570552923.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/tifurugexamusofikodit.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_off0000f75a.bin
16063b1cef5443d5aab63dc3fdf8001e3fc3b8adc2ffe07040cc65e8bb26d28c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 4968 bytes
font_01_sfnt_off00010878.bin
4eb049f8acd8096cb2bf273607909dcb17bb07fd3205c1703a75557bb48f8a21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10878 9980 bytes

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