Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa83eff25c322d7c…

MALICIOUS

PDF

75.0 KB Created: 2020-08-08 08:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc9e9541b049095aec41a3a5287f03d7 SHA-1: 675434c250cb5a8b2c1b070a11c9a6cf8141fd5a SHA-256: aa83eff25c322d7c4bacfde8c518e6a10eccc80e2c24f237b50f96d72d7d83b9
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically a URL on 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to an 'audit report' and the URL itself, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to distribute malicious content. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=qualified+audit+report+pdf+2020+19
    • http://sirar.my-minis.com/uploads/1/3/0/8/130813612/ronojujokuge-lobebiduridif-xijupekonorilak.pdf
    • http://files.cmcedmasters.com/uploads/1/3/0/9/130969061/525e4c939a3.pdf
    • http://files.fcapc.org/uploads/1/3/1/8/131871424/9297451.pdf
    • http://xuduwug.thecastlespa.co.uk/uploads/1/3/1/4/131483281/tibaxirar.pdf
    • https://cdn.shopify.com/s/files/1/0436/8872/2597/files/zaxotu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5422/7871/files/nokovexazokijipuporaviru.pdf
    • https://cdn.shopify.com/s/files/1/0435/8026/0511/files/96328817680.pdf
    • https://cdn.shopify.com/s/files/1/0435/7462/4419/files/pozediba.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/7188260797.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/xameviramebogugulax.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/wibidenimapebupakujasimi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2570/files/73553236006.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/28028446932.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/mefutiditivedijatusomukuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/10488567306.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/zidedomakutularowixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/logitech_harmony_linux.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/pevuli.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d353.bin
a7fe9435ea15ac6b0d3ac001e5ad115caae2ec8f8af7e090f11b74159547b245
pdf-font-stream PDF embedded font (sfnt) at offset 0xD353 5400 bytes
font_01_sfnt_off0000e5b8.bin
34929d59918f42f347d4da971f1910b1258e3ebbf41cd767f54bd509557200ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 7072 bytes
font_02_sfnt_off0000f8c6.bin
64d8564c8473db55806ad40c6e552294191337cb63b34224d723623e500b364b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C6 10868 bytes