PDF malware analysis — malicious · 4e1d533d21eb5343

MALICIOUS

PDF

34.9 KB Created: 2020-09-02 13:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a9e579f5d09554fec6a66923544e4b07 SHA-1: d6f1a1b5f99b6b84b179a97e25c5e0d4e4a6558b SHA-256: 4e1d533d21eb5343d03f9eb8653b49670ba22e2e1c77cbb15bb294815cf17ced

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a technique often used for phishing or malware distribution. One of these links, https://ttraff.com/wix?keyword=space+between+descendants+sheet+music, is flagged as pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the primary malicious intent appears to be the redirection via the embedded URL.

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.com/wix?keyword=space+between+descendants+sheet+music
- https://static.usrfiles.com/ugd/ca9b0a_37b11f3f99bc437baaecd980b6f56ed6.pdf
- https://static.usrfiles.com/ugd/89363e_5ae13984a49e40eab6baeb5197a9f4e6.pdf
- https://static.usrfiles.com/ugd/b8c837_302454ce0cdf42f5b196069a7f5d608f.pdf
- https://static.usrfiles.com/ugd/f4de5e_7d0a008c54634a6eb212309ade832243.pdf
- https://cdn.shopify.com/s/files/1/0440/8344/5925/files/island_of_adventure_park_map.pdf
- https://cdn.shopify.com/s/files/1/0431/4647/7722/files/boruzazonexi.pdf
- https://static.usrfiles.com/ugd/02beb7_b6318604986a4802a1b0871ac4e7d60d.pdf
- https://static.usrfiles.com/ugd/eb4c03_d82ca2b5a9a64db4869bc332d8f6787c.pdf
- https://static.usrfiles.com/ugd/79e0dc_7bbfdfdc27d74c6b84ab1b4e0e7cdb6b.pdf
- https://static.usrfiles.com/ugd/5360f8_7ae2b62a3c664626a567f78c2dbba9d2.pdf
- https://static.usrfiles.com/ugd/384ea4_fe9a127cce93476b96743ad6a18ed907.pdf
- https://static.usrfiles.com/ugd/cfbfd2_4a2fc94b12794c7c990967764a59b6e5.pdf
- https://static.usrfiles.com/ugd/a2e20a_eef17d4fcb274615bba5b46ae097691c.pdf
- https://static.usrfiles.com/ugd/3b47cb_4ce63f91d36b4e2196a1b48d164cd874.pdf
- https://static.usrfiles.com/ugd/af0aa9_1a7bce04e32f46d58ce9ea9f33b7ec5d.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_off00004961.bin` `1227ab6c5c434996bdecec78af0ac5c538baed91eb4374ae8d8b8aeee1d521e5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4961	5520 bytes
`font_01_sfnt_off00005c0f.bin` `3b802410aeb3a3e4bcf457005b02818021a8f552ccaa51bbc4772463c9162db9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C0F	10268 bytes

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