PDF malware analysis — malicious · d90f92401b047544

MALICIOUS

PDF

50.4 KB Created: 2020-11-05 03:00:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d036f4110230e9ef2a3a2322c5388794 SHA-1: 934f4ca2a582cfde9f648908f7b44990f097b1a9 SHA-256: d90f92401b0475444f621b6e2a586234c22092dd31aa7c1ae6a86c3a1b783f8a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, including one pointing to known malicious redirector infrastructure. The ML classifier strongly indicates maliciousness, and the presence of many external links suggests a link farm or redirection attempt. The document body text, though partially obfuscated, contains the URL that leads to the malicious redirector.

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://gettraff.ru/strik?keyword=hit+and+miss+engines+demonstrations
- https://jaxuwigoba.weebly.com/uploads/1/3/4/2/134266140/5201699.pdf
- https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/vujixovupolakowem.pdf
- https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/b95d06ce1.pdf
- https://watuwejaxor.weebly.com/uploads/1/3/4/4/134437052/8960712.pdf
- https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/zuwam.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://s3.amazonaws.com/vunizi/panera_bread_menu.pdf
- https://uploads.strikinglycdn.com/files/23690640-38da-4724-bfe4-fe1357307578/67077035954.pdf
- https://s3.amazonaws.com/gurowozenupifi/49082628122.pdf
- https://s3.amazonaws.com/debamijizozexo/12167469932.pdf
- https://uploads.strikinglycdn.com/files/5633e09e-8fe6-4761-abbb-55c700704719/9424632695.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007a4b.bin` `a9c0140db8bdf2fd2bbd04a29ef2114ffeb5f60e3f5ca4c4d7986950086571e2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A4B	4864 bytes
`font_01_sfnt_off00008a9f.bin` `c714d9aaabc8bf5b6d814802388886029172a8ebb7c9c391badc3f2b010a7106`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A9F	10464 bytes
`font_02_sfnt_off0000ae94.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAE94	4324 bytes

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