PDF malware analysis — malicious · 8ba5b76f85b8814c

MALICIOUS

PDF

47.6 KB Created: 2020-08-30 01:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 699c9c7688e8113d9229d09d32e5dcb1 SHA-1: ef93f02c9abaec9d05fa75a8ae0c8435764392c5 SHA-256: 8ba5b76f85b8814c83f91bf9caa43a30721f32a2ce8c4496fca190813a6b9f80

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, with a critical heuristic firing indicating it's a link farm. One of the primary URLs, 'https://ttraff.ru/wix?keyword=nekopara+vol+1+r18+patch+steam', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on 'static.usrfiles.com', suggesting a lure to external, potentially 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=nekopara+vol+1+r18+patch+steam
- https://static.usrfiles.com/ugd/b8c837_06726444992e4d47ac4fef5d33b314e5.pdf
- https://static.usrfiles.com/ugd/b8c837_515eaca7ad8d4dcc94d13af5426e78b9.pdf
- https://static.usrfiles.com/ugd/43d598_df914666b3c14576a3bf6e88c2558b00.pdf
- https://static.usrfiles.com/ugd/b8c837_85ce0891ebfe4382ab458826ebf6b0b0.pdf
- https://static.usrfiles.com/ugd/b8c837_cc679750b13547dd99d7637bdc02d937.pdf
- https://static.usrfiles.com/ugd/0d2908_1b6ffffbb17445b29604d6db334e924c.pdf
- https://static.usrfiles.com/ugd/b8c837_1c23bbcad5fd420c9bd99cf0bb1640e2.pdf
- https://static.usrfiles.com/ugd/d2751c_87a734a48db547bdbf978a972c2f2eef.pdf
- https://static.usrfiles.com/ugd/07625c_1a8b0c21468c4eec859dc6d80a0441c2.pdf
- https://static.usrfiles.com/ugd/0049ca_7c91ddcf80ba4e6c9b3d2ae4a86a62a7.pdf
- https://static.usrfiles.com/ugd/d3758e_3480df07627245f7a463d1dde447b49d.pdf
- https://static.usrfiles.com/ugd/3e87bf_8e6efb7ee50e47ed8c1366c0da56b688.pdf
- https://static.usrfiles.com/ugd/5b9365_4e890e40befe4e73b1877964bbcccbab.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/
- https://static.usrfiles.com/ugd/b8c837_1c

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000062ac.bin` `7026b39408964fb665091bde328dbee7dc1f43dc4b83314a1cb36b3d2260b3c7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62AC	7124 bytes
`font_01_sfnt_off00007aeb.bin` `4fd3732ffa7d556e6e20d39cc6b79509901753c15b0ef709af08c9561d96ae01`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AEB	5512 bytes
`font_02_sfnt_off00008d93.bin` `0b69a9ecd5d9f58532a36eccfc9edc03490fdb223eaed17fa05db4b72023f716`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D93	10400 bytes

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