PDF malware analysis — malicious · f7bc2bcd1b97a5f3

MALICIOUS

PDF

41.1 KB Created: 2020-08-29 04:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: fae50fc3c2d0562ad22cfe1c4cb896f2 SHA-1: 90a370b9228359e55bb60c634f93311f367b8fcf SHA-256: f7bc2bcd1b97a5f3eabd1d3565dfd90e336b4380a0d3ef1ddc5f65b3a133cb98

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1200 Hardware Add-Override

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm designed to lure users to malicious sites.

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.com/wix?keyword=munition+30-30+decathlon
- https://static.usrfiles.com/ugd/b8c837_455508254f8b4f8782217f181e537766.pdf
- https://static.usrfiles.com/ugd/b8c837_bd21fbba50664a7a81ed5054cf5cbee6.pdf
- https://static.usrfiles.com/ugd/b8c837_c70c64c97a5442d1a8edad5b0fde93f0.pdf
- https://static.usrfiles.com/ugd/b8c837_cd1ce91826c9476d95f0a45d7b407795.pdf
- https://static.usrfiles.com/ugd/b8c837_b7381071972346f296888b70f5ad0415.pdf
- https://static.usrfiles.com/ugd/b8c837_fa3fa47637e54e7f874f5f0f9805d6ec.pdf
- https://static.usrfiles.com/ugd/b8c837_574b4fec45da492e8caa4cedde46f2f9.pdf
- https://static.usrfiles.com/ugd/b8c837_92747f49a4494faa82a38d86f85e7e14.pdf
- https://static.usrfiles.com/ugd/b8c837_00b3d5b5938c44d1b04ac96dc5199399.pdf
- https://static.usrfiles.com/ugd/b8c837_9c9f33ad9f38459d81b3cdb95790cd1b.pdf
- https://static.usrfiles.com/ugd/b8c837_5efa5754b4034f06a5226a533c3911f5.pdf
- https://static.usrfiles.com/ugd/b8c837_577d03c2bc6a44589703ca04f8528cd5.pdf
- https://static.usrfiles.com/ugd/b8c837_a87f3a1e86b047a29fc930a9d4ecd5e2.pdf
- https://static.usrfiles.com/ugd/b8c837_5423c5b111fe40129d672af19baa3b33.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_off00005783.bin` `3382a79c63bc978659dab30ca439eb93b7392a31e5c272d8043ad1a4c3e1c947`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5783	5096 bytes
`font_01_sfnt_off000068e3.bin` `d8f9678d1db211ba2301cb8ce4c2170cf21980b6530171c111d0e4a2822e5cf7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68E3	15208 bytes

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