Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09f356f3bc6e5cd…

MALICIOUS

PDF

45.6 KB Created: 2020-08-19 00:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6abc907b6aa51dde3fb6033b3bfde5c8 SHA-1: a6a001d6f761e95c9f7cce6b94bbd07d7b5af675 SHA-256: a09f356f3bc6e5cda7ae8e43a23c2d5348005ba3eb1c792302a6692633926697
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=texans+injury+report+week+13', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the document's purpose is to lure users to malicious sites.

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=texans+injury+report+week+13
    • http://kuganegat.uwincoach.com/uploads/1/3/1/6/131606289/5191321.pdf
    • https://cdn.shopify.com/s/files/1/0435/6879/1713/files/16926523082.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8247/files/gobobegaduvejexebobenuzol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/28482772098.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/zopetisizupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/search_site_fors.pdf
    • https://cdn.shopify.com/s/files/1/0429/8339/1395/files/72075737218.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/67446210405.pdf
    • https://cdn.shopify.com/s/files/1/0434/0098/6787/files/zugutekixute.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/20822565517.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7493/files/niliguwigikegibufutuvuti.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/pisuvuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/youtube_2_wav.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_off0000743d.bin
5278029100985f64dcf0d49f186ac8c65cd6d376a0c19004214097c6dc85a3bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743D 5348 bytes
font_01_sfnt_off000086a6.bin
a919ae0ca53ae42048e46f341d1d602ee43c3171754accf874920b439f60d205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 10372 bytes

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