PDF malware analysis — malicious · 8e7188c78a8c934c

MALICIOUS

PDF

38.2 KB Created: 2020-09-07 06:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 00421b7465224263484761428ef450e4 SHA-1: 3fae602351fe53645232b55518df24cb75a2324b SHA-256: 8e7188c78a8c934c67947ab4591dd4e9f6cb3cbf0274f74a99414884f6c853e0

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the document links to known malicious redirector infrastructure, specifically `https://ttraff.ru/wix?keyword=fitted+sheet+nghia+la+gi`. The presence of a link farm and a malicious redirector suggests an attempt to lure users to a compromised or malicious site. No scripts were extracted from this sample.

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=fitted+sheet+nghia+la+gi
- https://static.usrfiles.com/ugd/83e584_3aa5f7546c6f407e8e9c890d604d4ac6.pdf
- https://static.usrfiles.com/ugd/3826db_02c5f47283894ca2ba036279020ba9f7.pdf
- https://static.usrfiles.com/ugd/cd81e9_a67dc8024f4f4953a7f1b6ee4ec68ac3.pdf
- https://static.usrfiles.com/ugd/ae15ca_016ca14caace4b60995b7c58ea2f1c71.pdf
- https://static.usrfiles.com/ugd/5ad03d_1dfecc1ea3ed4237984d895a200b7f29.pdf
- https://static.usrfiles.com/ugd/c345b0_375d021670334e8ca8a56582f78a2e11.pdf
- https://static.usrfiles.com/ugd/895bef_590e2ded995d4f5c996f6bc8f6d0a54d.pdf
- https://static.usrfiles.com/ugd/278743_9f46f23cee774b2f9d9499bd390d9e9b.pdf
- https://static.usrfiles.com/ugd/8b61cf_7141cafed0c442c485832408794ac154.pdf
- https://static.usrfiles.com/ugd/724bd4_d3643e878b354ee3ad5e2aa2d7c8e94d.pdf
- https://static.usrfiles.com/ugd/2ca22b_2656d3fdc6fc4156a7da5b0d0fff12cb.pdf
- https://static.usrfiles.com/ugd/165585_de4093a54d4242639e0847e54f7e3e46.pdf
- https://static.usrfiles.com/ugd/834936_869f27ac89254132b9ed51b30d378976.pdf
- https://static.usrfiles.com/ugd/2f3ac6_e17cadf7e4484a8e8130ca67c727fae4.pdf
- https://static.usrfiles.com/ugd/73f3b0_ce0bbceeed17492db623798478547ebd.pdf
- https://static.usrfiles.com/ugd/5ea4d5_8b20aa0fec6d406da3916a01cd699bde.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_off0000583c.bin` `100fafa058fe653c022a2c93bf81a75b56aff4baa12c9e8707562d81321c82bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x583C	4948 bytes
`font_01_sfnt_off00006915.bin` `5227617e159602c02f85acf264a295c906eaac70cfcbab6e2e55c23c0a76165a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6915	10272 bytes

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