PDF malware analysis — malicious · b9bcf8cc95a9eabd

MALICIOUS

PDF

55.1 KB Created: 2020-08-29 04:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a989fbc79cec5a3827bf6d56532ee9a6 SHA-1: ec8a00dcf669cb289b64f3273725e0e97046db88 SHA-256: b9bcf8cc95a9eabd83176370792c4c686c1a3234c6ac8794af0bb4d4cb6f8c8d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=identification+of+an+unknown+compound+lab+report'. This URL is embedded within the document's body, which is presented as a lab report, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous external links, further supporting the 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=identification+of+an+unknown+compound+lab+report
- https://static.usrfiles.com/ugd/b8c837_fd95d354f52045b6937cb42309b17429.pdf
- https://static.usrfiles.com/ugd/b8c837_4c3db10aacf14b5e8cb2cfbbe9a95f8e.pdf
- https://static.usrfiles.com/ugd/b8c837_badb69e4b772490e83210f5b6b084383.pdf
- https://static.usrfiles.com/ugd/b8c837_22c967cb24a741c786d850dd4552cf43.pdf
- https://cdn.shopify.com/s/files/1/0435/3366/4408/files/91889865211.pdf
- https://cdn.shopify.com/s/files/1/0433/0346/9221/files/33979135959.pdf
- https://static.usrfiles.com/ugd/b8c837_db6e2c4000844511928af7324fb36554.pdf
- https://static.usrfiles.com/ugd/b8c837_c6c592f91fdb4e12b5df3134c75d12c1.pdf
- https://static.usrfiles.com/ugd/b8c837_24c66755213e45759a4380b23128dc3c.pdf
- https://static.usrfiles.com/ugd/b8c837_de1f308bf5e34aafbe3b8548f13ecdf3.pdf
- https://static.usrfiles.com/ugd/b8c837_c808b6b09c1e45648afa93b61cb4a8ea.pdf
- https://static.usrfiles.com/ugd/b8c837_5fd5dcb1a92e49d8840df450f72f6b06.pdf
- https://static.usrfiles.com/ugd/b8c837_c6a9c76e23574a8d8e6dcfbed89c3fa2.pdf
- https://static.usrfiles.com/ugd/b8c837_4acf3201a1314da3a6e01edc96db7ad9.pdf
- https://static.usrfiles.com/ugd/b8c837_67fd2dedf2d34e5fb038e6b26d38895a.pdf
- https://static.usrfiles.com/ugd/b8c837_0443642c601b4e79819d2d3219442d66.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00008c0f.bin` `b6330b87a0ce01b1f0a920a6e204098ce9d0886ab3db37bdd9bcb4382cfdf747`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C0F	5240 bytes
`font_01_sfnt_off00009dcc.bin` `04b1569bf4c172285e1f40add8b791bff19caefdd77ed864bfb23e344ad0ab1a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9DCC	10184 bytes
`font_02_sfnt_off0000c0aa.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC0AA	4324 bytes

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