PDF malware analysis — malicious · 93b7ab3703e5d9ff

MALICIOUS

PDF

33.1 KB Created: 2020-09-01 06:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 02ca923ffd6a9b594fdcf0ecff7a61aa SHA-1: be7b33775547cfda3dc7e0c7ca560705b2a2b503 SHA-256: 93b7ab3703e5d9ffa4b24eab9fd9a4d407373fcb6469b9dd5af5e132ffe367dd

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body disguised as a software manual. The link points to 'ttraff.cc', a known malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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.cc/wix?keyword=biacore+evaluation+software+manual
- https://static.usrfiles.com/ugd/b8c837_1c000e4c12a145e98246d6fbf9937f2a.pdf
- https://static.usrfiles.com/ugd/b8c837_38c043821084448fb437f6f658a03275.pdf
- https://static.usrfiles.com/ugd/ee9d3f_4578b3a8a71945e5a137e8068f1e6a6b.pdf
- https://static.usrfiles.com/ugd/3e9e83_6f18bdd1aa774591a39b933dc7a0d7a8.pdf
- https://static.usrfiles.com/ugd/b8c837_557249ec494e4881a9f2d85c22145eb4.pdf
- https://static.usrfiles.com/ugd/74e905_56671ab35ef94cd8968e56219d2b47d5.pdf
- https://static.usrfiles.com/ugd/2f3ac6_d5072e8db1814407852281a0c60e8c10.pdf
- https://static.usrfiles.com/ugd/5ad03d_b8f616233dce4bf69a451daf94096ffd.pdf
- https://static.usrfiles.com/ugd/defcb2_e2d97d92878e48478e2797283c6aa7e4.pdf
- https://static.usrfiles.com/ugd/e5cbe5_fdc9f187b43a49e4b4e110c24bacd376.pdf
- https://static.usrfiles.com/ugd/b8c837_3a1035ac50134c5da3e49d72c27d05b6.pdf
- https://static.usrfiles.com/ugd/2f8cea_ffa01331e6514f238bedef420f172dcf.pdf
- https://static.usrfiles.com/ugd/b8c837_55dcb8d9da9740ba95e7494f69c9a316.pdf
- https://static.usrfiles.com/ugd/97aff7_6ebd858e013a40da918312701f3827b7.pdf
- https://static.usrfiles.com/ugd/e3ff21_4058c7ecbfe44e71a56fa09caa78c9e5.pdf
- https://static.usrfiles.com/ugd/0047a4_3420c7f6bfbd42ec86c6989787bc1a2f.pdf
- https://static.usrfiles.com/ugd/e02969_7835dbfabb714215b34ac9187dc65f43.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004761.bin` `dc9cd5e44c1f1e10a079d209b1d497bceb278f0e33f7d298410499af53c643ce`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4761	5228 bytes
`font_01_sfnt_off0000592a.bin` `0ff84a8d689acab70ba400d5494d50e98aa1d9ae8a33c3366974bf11f4b65852`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x592A	8912 bytes

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