Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb09731a91866fa6…

MALICIOUS

PDF

41.0 KB Created: 2020-07-30 18:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8414138a8c31667656ca9610841ba94e SHA-1: ce742c5a22d6f91a788cc5a6e00721d3662f5477 SHA-256: bb09731a91866fa6b05db4a0ec5c636998ac5516a99c452f662acab258bcaaec
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body is heavily obfuscated and appears to be metadata rather than user-readable content, suggesting the primary malicious function is the embedded link.

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=bls+pdf+2020+espa%25C3%25B1ol
    • http://files.brockhousenurserystalbans.co.uk/uploads/1/3/1/4/131483249/wenep.pdf
    • http://files.thermotrix.com/uploads/1/3/1/4/131407734/12612e9.pdf
    • http://files.sailingphoenix1.com/uploads/1/3/1/3/131379591/9569734.pdf
    • http://files.accentremodeling21228.com/uploads/1/3/1/3/131380992/noluvedalabeze-bokal.pdf
    • http://files.alessiadana.com/uploads/1/3/2/7/132740606/dikalemojepemovimu.pdf
    • http://files.sailingphoenix1.com/up
    • https://cdn.shopify.com/s/files/1/0433/4914/7803/files/88587768362.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/65769260303.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/71444779462.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/71741757271.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/96671658868.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/28825354573.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zovoxumaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/ziwidezuzobapuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5586/5242/files/27722818843.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_off0000611c.bin
62f6f6bca646a7d834a608258a47bc2f2e0961dbed464d228a6d847bd74ae8a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611C 5028 bytes
font_01_sfnt_off00007232.bin
e0e04a1d3676dae49d96c9fe0f02da0bca0ac0f370caaface4e7fa0639cc7c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7232 10144 bytes

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