PDF malware analysis — malicious · 731784fdb522b76b

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 18:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bc455853d011e50e7b7dd7779316b50c SHA-1: df58844b60bb558ec447fb2250aae277f6c31689 SHA-256: 731784fdb522b76b405d27797677727e5ed4a9ed0a4cbd7a8975bff5d4c29c65

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to generate traffic or distribute further content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=formato+de+entrevista+laboral+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/4dd980_522dd3d5cfb64fbd9cfa2cd063035fe5.pdf
- https://static.usrfiles.com/ugd/b8c837_e3a54f9e10504ccda4b2910aa5eba357.pdf
- https://static.usrfiles.com/ugd/b8c837_6496ba0ea7e0410296fce502a7dc1e01.pdf
- https://static.usrfiles.com/ugd/bfbc46_9e1eebe60cae4ff188118fd38b837f69.pdf
- https://static.usrfiles.com/ugd/b8c837_1037790485224ff38018261402570516.pdf
- https://static.usrfiles.com/ugd/b8c837_1a36094868c549edb7d52b3539906ddd.pdf
- https://static.usrfiles.com/ugd/b8c837_7bcc34a0377846cb9b108c067d771ad2.pdf
- https://static.usrfiles.com/ugd/b8c837_1d9d6dc979fe4e8493946f2e5b0cc57e.pdf
- https://static.usrfiles.com/ugd/5fd5c1_26f7568c24d1440d97414dfe68c04652.pdf
- https://static.usrfiles.com/ugd/b8c837_85f6f5ce8cc248e7a4413e0384b2d39e.pdf
- https://static.usrfiles.com/ugd/b8c837_a960f9bc88da47cbaa2df60b4a7a4a2d.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000622d.bin` `5d612b3014a600ef84f5a6fcf9cba0d5d53033023ef8168d1b1a06ba745d7ce6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x622D	5344 bytes
`font_01_sfnt_off00007441.bin` `359fc06643e0f69ac8f98d23e58d515febf8b923955336043e524cc66668e4b0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7441	10736 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.