Malicious PDF — malware analysis report

Static analysis result for SHA-256 2124fe3db8055812…

MALICIOUS

PDF

37.6 KB Created: 2020-08-01 08:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 068bf8143442ec7bcd8d700f9a395451 SHA-1: e46794740a4ff028bf2917fea51d2637ab020b15 SHA-256: 2124fe3db8055812ddff633aa4378c8fe3fef512dd0f7a484dcfc160e30871d2
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is presented with a keyword likely intended to entice clicks. The document body, though heavily obfuscated, contains references to the 'Benny Hill theme song' and the PDF creation tool, suggesting a lure. The ML classifier strongly indicates maliciousness.

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=benny+hill+theme+song
    • http://files.champagnedargent.net/uploads/1/3/2/3/132303410/wopavaxojodidereli.pdf
    • http://files.siceyourlife.com/uploads/1/3/0/8/130874204/842884.pdf
    • http://files.bigpigeon.us/uploads/1/3/0/7/130739593/vunak-kujupasiwisevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/scope_document_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/lepadalutanegovamute.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5770/files/fefupowiwawikipika.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8661/files/84142674125.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/89085641292.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/dazavogabazaresaxavowe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/raveb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0356/7515/files/77345082610.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/waruf.pdf
    • https://cdn.shopify.com/s/files/1/0438/5108/8032/files/cal_newport_deep_work.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/36362682418.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.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_off000055b2.bin
b35a847d1e5def2b32eedf8c6dce132d26186b9ec85cad8e8e24ad94c4fc2a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B2 4944 bytes
font_01_sfnt_off00006674.bin
fa3df93b0b987e07a8184c2bfe5a243e76c19457b4d96932f16654790fffbcf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6674 10368 bytes

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