Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e86cbafe1417e14…

MALICIOUS

PDF

40.4 KB Created: 2020-08-24 00:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0136877e664535e5c6d9718fde0c34b5 SHA-1: 24787b0a961ced7c355d623ad36f3fcc41400c22 SHA-256: 8e86cbafe1417e14e13237acf61061fabd2d1aaa8fdf0821f8b2f776114be8af
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a large number of embedded links, many pointing to shopify.com domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=yahoo+answers+health+and+beauty
    • http://files.rawlinsmusic.co.uk/uploads/1/3/2/8/132814906/sajodomavatukoxaj.pdf
    • http://files.christiestimber.com/uploads/1/3/1/4/131438059/2a5c43dce8.pdf
    • http://files.allthingsroe.com/uploads/1/3/1/4/131438113/4944000.pdf
    • http://files.volkerspatchcollection.com/uploads/1/3/2/3/132303013/dojelulopem-bewowikage.pdf
    • https://cdn.shopify.com/s/files/1/0434/4266/7676/files/40494737130.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/english_alphabet_letters.pdf
    • https://cdn.shopify.com/s/files/1/0439/1721/3864/files/73580884509.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/jinesusigifalaluk.pdf
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/24390658835.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6060/files/72514469536.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/votudizanuxoxadowijima.pdf
    • https://cdn.shopify.com/s/files/1/0448/9651/8299/files/ravav.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/selinutakoxomobakaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/22532343782.pdf
    • https://cdn.shopify.com/s/files/1/0436/0952/2339/files/33457513191.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_off0000600b.bin
f63c786ea3670f3363e6d292605d63367b22bf38a61a4d145caac5030cf3db9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 5208 bytes
font_01_sfnt_off000071c9.bin
5be90ed70192fa68461d0790420ecf70c6cbeac8d883312ade5c764471e7e59d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9 10264 bytes

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