PDF malware analysis — malicious · 984223f5970eb9c3

MALICIOUS

PDF

40.6 KB Created: 2020-11-09 16:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: efb0913a4a0433133acf9f42336506f5 SHA-1: 128d57f42a879f625f08f63184d82cbe94ee2835 SHA-256: 984223f5970eb9c30f4141e9cc7319bacaf456b4ee75fcb79092be9004f1c10a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed to redirect users to external websites. The document contains numerous embedded URLs, including a primary one at 'https://trafftec.ru/123?keyword=capital+appropriation+request+meaning', which likely serves as a lure. The ML classifier strongly flagged this PDF, and the presence of a large number of external links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
External URI info PDF_URI

PDF contains an external URL action
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://trafftec.ru/123?keyword=capital+appropriation+request+meaning
- https://cdn-cms.f-static.net/uploads/4380380/normal_5f8ceebc0fb22.pdf
- https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/6815789.pdf
- https://posolefuriw.weebly.com/uploads/1/3/4/3/134374222/1022666.pdf
- https://famotufenimuz.weebly.com/uploads/1/3/4/1/134132127/7353534.pdf
- https://cdn-cms.f-static.net/uploads/4389101/normal_5f93df95c28d4.pdf
- https://bemogipe.weebly.com/uploads/1/3/4/3/134379528/dememi.pdf
- https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/927a389efe.pdf
- https://fowidejufato.weebly.com/uploads/1/3/4/5/134582967/dorinubedoli-buzebebagagag-kumopavopedopas-jometew.pdf
- https://cdn-cms.f-static.net/uploads/4414169/normal_5fa289661862c.pdf
- https://cdn-cms.f-static.net/uploads/4372073/normal_5f9126617aadf.pdf
- https://wetuwisiw.weebly.com/uploads/1/3/4/4/134495793/sunixizofo.pdf
- https://cdn-cms.f-static.net/uploads/4379744/normal_5f8bfc0e2ab4c.pdf
- https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/3386367.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wonoti/ginisiguteput.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_off00006097.bin` `3826aaca7ad6382b9a2fb9e8651fc88ea7b63dd017fa46684d4b08d1d4c23e9f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6097	5168 bytes
`font_01_sfnt_off0000720c.bin` `8f1bd3ec2bfedc8beeefbef018d86f64e63ba0b4d6df85a2ccdc8bc7190a6794`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x720C	10268 bytes

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