PDF malware analysis — malicious · df0833ca55e1bea3

MALICIOUS

PDF

49.2 KB Created: 2020-08-29 05:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 99adc76c544406d526625f108af8db14 SHA-1: 01cdd9a64bc50be7cd1a4972bdfb3e50d37c0ae2 SHA-256: df0833ca55e1bea31224ed18c0484aa3ff107d6729a7bf3b2e01b7031d9a0d35

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.ru/wix?keyword=%25C3%25A9valuation+les+nombres+jusqu%2527%25C3%25A0+100+ce1', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, but the link farm and redirector are sufficient indicators of malicious intent.

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.ru/wix?keyword=%25C3%25A9valuation+les+nombres+jusqu%2527%25C3%25A0+100+ce1
- https://static.usrfiles.com/ugd/b8c837_0f0678bcc89d460ab75901da9b38828a.pdf
- https://static.usrfiles.com/ugd/b8c837_46ba6182436e4eddb7f5e135cc2b47a3.pdf
- https://static.usrfiles.com/ugd/b8c837_c256828c855547359a80938226cdcb4e.pdf
- https://cdn.shopify.com/s/files/1/0432/4818/9603/files/45145185484.pdf
- https://static.usrfiles.com/ugd/b8c837_e392bc79161543b7b6f1b01790f5d232.pdf
- https://static.usrfiles.com/ugd/b8c837_e6d5c376767f4cbdaf1b5c0ac0765ec8.pdf
- https://static.usrfiles.com/ugd/b8c837_2a8a40dfe72642cdb52092dba0978cb6.pdf
- https://static.usrfiles.com/ugd/b8c837_a2b645165f764475a2025cef6bc9471f.pdf
- https://static.usrfiles.com/ugd/b8c837_4bf834038ac2425ab653fe22675e28e1.pdf
- https://static.usrfiles.com/ugd/b8c837_d01c2263745f421caa30d754d1a999cf.pdf
- https://static.usrfiles.com/ugd/b8c837_1184f9f3fe86435aa291defcad351a0d.pdf
- https://static.usrfiles.com/ugd/b8c837_153e1287329848209452019ea5d5b110.pdf
- https://static.usrfiles.com/ugd/b8c837_f3767ac4ebae471ab6c05b0be961bbe1.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00005956.bin` `100cc1ba8b119d1cbe9c5732b3442404c82ce818b13034cdccdf13c1e91a6c8b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5956	5668 bytes
`font_01_sfnt_off00006c10.bin` `bae0d1432181dca5ec5c6b4c7cca458af5ae91dacc9c66207c11675113a7a05c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C10	11632 bytes
`font_02_sfnt_off00009182.bin` `aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9182	16312 bytes
`font_03_sfnt_off0000a70e.bin` `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA70E	4324 bytes

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