PDF malware analysis — malicious · 93ddda611eef101c

MALICIOUS

PDF

40.3 KB Created: 2020-08-29 19:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2ded147a1ff891102574db97a3ac49ea SHA-1: d3be104738d3624f910d28e383bc6e704ca4f927 SHA-256: 93ddda611eef101c1781343e1d3c20e480c93574db0313c08949dfc9aeafa57b

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that triggers this redirection. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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=california+notary+all+purpose+acknowledgement+form+2017
- https://static.usrfiles.com/ugd/ace02d_a077212687c848d5a733f92bc2101f98.pdf
- https://static.usrfiles.com/ugd/0aab01_78727bf25d444835bf72706d7d79ab4c.pdf
- https://static.usrfiles.com/ugd/b8c837_c60a33eac6584991969a75197cdb0190.pdf
- https://static.usrfiles.com/ugd/b8c837_417c0ff001e2497caa8b57bf0fc4ca53.pdf
- https://static.usrfiles.com/ugd/b8c837_9279de599f68444c995f795baf3c8916.pdf
- https://static.usrfiles.com/ugd/b8c837_9015b1e3454d4fabb526a9633a00aa3b.pdf
- https://static.usrfiles.com/ugd/b8c837_1b1a633001ce4af7bdc2582769e90779.pdf
- https://static.usrfiles.com/ugd/8c0e65_9ce9364e19cb443281926a5a670de036.pdf
- https://static.usrfiles.com/ugd/b8c837_6addfa1903ca4b7481afaf82ee466e43.pdf
- https://static.usrfiles.com/ugd/1849a1_f4a3b7929bf548b083bcf78a59281c22.pdf
- https://static.usrfiles.com/ugd/b8c837_a8e836acaa924b13917c393c764f084a.pdf
- https://static.usrfiles.com/ugd/c7ef1a_c6b47c98b2f242aaa178353e0da7feb9.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_off00005c93.bin` `763f9411cf7eda02885e853d4a55183e76ffe9878c00ceb5f05b772e4505f15f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C93	6044 bytes
`font_01_sfnt_off0000713e.bin` `73bff5fb6a5f661992f28d79e7c88a678df7058e2c78cd5dfa4548ee41382434`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x713E	10376 bytes

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