Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61d89459c8deb85…

MALICIOUS

PDF

47.7 KB Created: 2020-08-29 20:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acce47b456fef1881190e035039b4108 SHA-1: 1ec498d5e5578b2e5fa60fec229a0a7faddec8e6 SHA-256: b61d89459c8deb85cb90ad96055cb163da53f500d46e8e914b42baace5f46962
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is 'https://ttraff.club/wix?keyword=how+to+save+a+life+drum+sheet+music', which is part of a known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended lure. The presence of numerous external links, many pointing to 'static.usrfiles.com', indicates a strategy to distribute or obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=how+to+save+a+life+drum+sheet+music
    • https://static.usrfiles.com/ugd/7ea8bb_6b112b7ca71c45afb4d0da44a27bb148.pdf
    • https://static.usrfiles.com/ugd/de65f7_67cdee330f054c9caf816aa96189f66d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f7fdbc6feec41b0ad202b088c67836d.pdf
    • https://static.usrfiles.com/ugd/b8c837_502f1399816e44929536504239af61e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab181c78135d41809a4d3d37dd25602a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4574247d39a42efb2b447b06046fd2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_39031162c1a244c890e29b41318ea892.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/fiwipinibituxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8969/files/marathi_kadambari_list_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/5430/5175/files/axial_flow_pump_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/roguxemituduxolag.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/81255572195.pdf
    • https://static.usrfiles.com/ugd/b8c837_1aee28fe6f304a8d85aede435e29a13c.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3e.bin
2b58a3861d86f38acc11213bc117971a46a2da57be83507872a9de2290d649a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3E 4360 bytes
font_01_sfnt_off00006b7a.bin
8d427aba1cb6fde43e0bca4340ca4822ec49e52240d8d90862061cc88901f8b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7A 5148 bytes
font_02_sfnt_off00007d0e.bin
2cbc88d574ec87178b803e78b1b1f2fbe0ff145139ae84eba98301cdbe6c4a0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0E 11784 bytes
font_03_sfnt_off0000a33b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA33B 4324 bytes