PDF malware analysis — malicious · 9da963c675d938fa

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 10:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a9856c06e62af8206efec9ddaaf2737e SHA-1: 996f7e597d9503fc3e5ca191ac70a1b6406f293e SHA-256: 9da963c675d938faaf1f8f19d9b17577cdce9cec42e6ba60dce1768b5f04c79f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link and a large number of embedded links to other PDFs, suggesting a link farm or a method to distribute further malicious content. The primary malicious link is `https://ttraff.ru/wix?keyword=descargar+formato+de+cedula+venezolana+editable`, which is likely used to lure victims into downloading a malicious file. The document body, though heavily corrupted, contains fragments of the URL and metadata indicating it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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=descargar+formato+de+cedula+venezolana+editable
- https://cdn.shopify.com/s/files/1/0437/6431/8359/files/british_english_conversation.pdf
- https://cdn.shopify.com/s/files/1/0429/8909/3018/files/kiwojapa.pdf
- https://cdn.shopify.com/s/files/1/0431/1764/1879/files/xuxidatujoboxutiwedosede.pdf
- https://static.usrfiles.com/ugd/dd4472_d37f9431c3be4310a901af8822926abc.pdf
- https://static.usrfiles.com/ugd/b8c837_e0120433f8ed46b1b7e740f4ad7a52f0.pdf
- https://static.usrfiles.com/ugd/f09a9d_d8c77ba0953e43d1bebc342c7e234fac.pdf
- https://static.usrfiles.com/ugd/738632_9b3e0678242b46479dd51e3b0e73da29.pdf
- https://static.usrfiles.com/ugd/b8c837_0cbffd95719a48abb4eb29ecff715736.pdf
- https://static.usrfiles.com/ugd/b8c837_1dcce9e24629473e9e374a9c32e7160e.pdf
- https://static.usrfiles.com/ugd/77eba6_ab22ad12aa934c5ea5b5cf6b3180b8f3.pdf
- https://static.usrfiles.com/ugd/b98abb_7cb67104ab46479b980337e3cce40eee.pdf
- https://static.usrfiles.com/ugd/9374a7_d7bf84622c4c48689e7f2ba987410f6d.pdf
- https://static.usrfiles.com/ugd/b8c837_a32b667547324476903e0ce391f8835c.pdf
- https://static.usrfiles.com/ugd/7ea8bb_2d05987c4e5d4834b13be39154a613be.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_off0000486c.bin` `497c0610e2c1a9c533bf500a9665fa337e9cfe0032e4c695231d51b338e16a65`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x486C	5592 bytes
`font_01_sfnt_off00005b62.bin` `f5018edd104779b565d4c693a6f9f9106ae0f679840563bc1f6d4f3203bf9fc6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B62	10940 bytes
`font_02_sfnt_off00008012.bin` `536551dee6876366cf8a5d925709f0aaa9c9f58e9963f4e154d0e8cf77de6ee3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8012	16196 bytes

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