Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f2795f9ddd0e35…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 11:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ddc78936f247bf058ad3667490ef07d SHA-1: 66d86dce72e17d81b7cc3903725bcb5bb583cc8e SHA-256: 84f2795f9ddd0e3574f38009471ebf940ac835f9500f098d58e30f405c5cd2c8
120 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'loom knitting guide patterns pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious URL is https://ttraff.ru/pify?keyword=loom+knitting+guide+patterns+pdf, which likely leads to further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=loom+knitting+guide+patterns+pdf
    • http://files.belovedportraitsbypatti.com/uploads/1/3/2/6/132695519/7857371.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/54638225060.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6507/files/jofofitusonelekofilakupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/58174392240.pdf
    • https://cdn.shopify.com/s/files/1/0429/9646/5823/files/hard_geometry_problems_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/76117250443.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/dumojakuregukipowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0436/1083/3058/files/isometric_grid_a4.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/woocommerce_related_products.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/boxivoxi.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_off00006234.bin
82bdbeebc1b02ad5241b2e9e120ec2d7519de8d4c78252248bfee73f95e52a5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6234 5332 bytes
font_01_sfnt_off00007447.bin
f73a07d1d5ac863a696504d62a1fcd62c4d4df13426f3721e62f0f3fee5d8a58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7447 10236 bytes

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