Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5479bfbbbfb807…

MALICIOUS

PDF

35.9 KB Created: 2020-08-21 01:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50fab9cdaead077414ce5f6a18996e6f SHA-1: fa98246183d38a069eca780c6d6d0acbb57ffc90 SHA-256: da5479bfbbbfb80728e8c7af468f8039fcd9908c45502369ca35ec4f424919f1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.ru/pify?keyword=brass+instruments+fight+list+answers'. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=brass+instruments+fight+list+answers
    • http://labila.deeperhealing.net/uploads/1/3/2/8/132816066/5441850.pdf
    • http://files.zouzousbasement.com/uploads/1/3/1/3/131380895/sator.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/92925769408.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65105912314.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/62910669115.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/tozosoriletorasunaxenones.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6841/files/11926766362.pdf
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/symbiosis_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/gunatomegipironazunowa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1155/files/3564396998.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/21178523876.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_off00004ec8.bin
d6bf998561f8ac6ba4193a08627cbb9e61692de0d03d2915ecb8b560229b3f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC8 5320 bytes
font_01_sfnt_off000060c6.bin
fdee1070c8c5cf4857aa02936e796f3165736b586e9e46e17511a4e19e8b41a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C6 10120 bytes

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