Malicious PDF — malware analysis report

Static analysis result for SHA-256 490376a13135c3ad…

MALICIOUS

PDF

39.4 KB Created: 2020-08-30 04:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 678a9ffaf198bf7f372ca54c55e30e61 SHA-1: 7a5af661984328a8dda28b489382f32782797935 SHA-256: 490376a13135c3ad6e3631378d89a1a5a76b4b965558eaf6d261327162456ea7
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=activer+xp+sans+cl%25C3%25A9'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0432/1925/5454/files/british_council_reading_b1.pdf' being one of the first identified. The document body, though heavily obfuscated, contains these URLs, suggesting a lure to external malicious content.

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/wix?keyword=activer+xp+sans+cl%25C3%25A9
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/british_council_reading_b1.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/dutonigunamolepatu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/dadorowuvonumu.pdf
    • https://static.usrfiles.com/ugd/d5cf39_12506e08116d483e96c6792bc8a60303.pdf
    • https://static.usrfiles.com/ugd/9e53d4_555397280b52438683b46b7c40da0f77.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_f246b58bfce943869528b2a441789511.pdf
    • https://static.usrfiles.com/ugd/1decf9_f7d2041d75514073bff65f08e00f24e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fd14edd0c424e399f80c1a2b0f6c6e0.pdf
    • https://static.usrfiles.com/ugd/73cb9e_bbe6a93104bf4ba0ae8c510c5325e32c.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b9d9deb186495c844334894d34d319.pdf
    • https://static.usrfiles.com/ugd/2b25b5_a9f62ef06fff46c49acbf27a324f245f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c02035af460e4bfc92c6e51eb577c4a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2c2396210724176abdfc9fe94180e7e.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_off000059e0.bin
98a3055cbf3b47f588117361c6cfd80b02a1173dfd264b548c932bc9d041f9d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E0 5184 bytes
font_01_sfnt_off00006b4f.bin
138710d9715cb098a8dff0429b7657a0f2e3c2f341b4814b1f50bd4db6812bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 11564 bytes

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