Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75a8a7065b7d6e2…

MALICIOUS

PDF

41.8 KB Created: 2020-08-02 09:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a456e49bd7c17143693dd761169160a2 SHA-1: 984a8582b68af40b7e2e299a6d1c30c15c955796 SHA-256: f75a8a7065b7d6e2e261618c1b0a4c1149da266ee04b92d6d81abf027e29a1a8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. The presence of the 'udp://open.demonii.com:1337/announce' string within the document body further supports the malicious intent by referencing a known BitTorrent tracker often abused for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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=udp%253A%252F%252F+open.+demonii.+com%253A+1337%252F+announce
    • http://files.projectwholebloom.com/uploads/1/3/1/8/131856743/sesibuxigunux_jibesex.pdf
    • http://files.glckilleen.com/uploads/1/3/1/6/131636789/6636b8d85.pdf
    • http://files.tuxpeoplesmusic.com/uploads/1/3/0/8/130874495/kigevusepufe_nomigisu_nolokuxe_lakobugujokude.pdf
    • http://files.darrylstrange.org/uploads/1/3/2/6/132681812/vanidene-dulonol-mewopupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/vesedowefini.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/14847982439.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/25336764439.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negonarufefozosaburesid.pdf
    • https://cdn.shopify.com/s/files/1/0429/1539/7788/files/wegemoxado.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/the_fifth_discipline.pdf
    • https://cdn.shopify.com/s/files/1/0432/4465/0651/files/varutusaxokigumo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/63328454396.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/fazuwaxa.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006866.bin
f7d389c33f41d63aa957e5fe131b565873716692b5633f60633df1d80a0ced68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6866 5316 bytes
font_01_sfnt_off00007a88.bin
1a1b7721542364af1d5d0ebd9096a2c96d5a1712fe3c0e44e6f76b77241f9dc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A88 12572 bytes

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