PDF malware analysis — malicious · 3225b700e8df30b8

MALICIOUS

PDF

44.3 KB Created: 2020-11-06 17:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c1a7f0934003940632fd6d09a18ab57b SHA-1: 5d26f854ebc96b99a07d0e97d5336a095c98d38d SHA-256: 3225b700e8df30b89a5622682d5213bdc93c6bb304c0e5327d9546cc2165900e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to manipulate search engine results or redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/123?keyword=selena+quintanilla+accomplishments+and+awards
- https://xukolewijox.weebly.com/uploads/1/3/4/3/134320036/nexemonejematekazogu.pdf
- https://cdn-cms.f-static.net/uploads/4368265/normal_5f9bcf3541a55.pdf
- https://sofakixejiz.weebly.com/uploads/1/3/4/2/134265497/309154.pdf
- https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/5d0410.pdf
- https://zomurudol.weebly.com/uploads/1/3/4/4/134492975/13328ed8.pdf
- https://cdn-cms.f-static.net/uploads/4366388/normal_5f873daf1e178.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://wejogude.files.wordpress.com/2020/11/niwasegini.pdf
- https://s3.amazonaws.com/mijedusovineti/vuxudavavunurokuw.pdf
- https://uploads.strikinglycdn.com/files/170bf35b-4eed-437a-84c0-58fa95094033/10950911363.pdf
- https://lepunesibim.files.wordpress.com/2020/11/99828904323.pdf
- https://s3.amazonaws.com/pukasojalu/money_hack_for_pixel_car_racer.pdf
- https://s3.amazonaws.com/nosepevozux/78620515820.pdf
- https://solejefiv.files.wordpress.com/2020/11/pemogadanon.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_off00006b74.bin` `de6f0dd105b99f2a36e4718ac6cb25ca53bfc28d4c78914682df56247c04161f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B74	5632 bytes
`font_01_sfnt_off00007e87.bin` `bc43554b0ce8b0c9f96e8e42a8883f16caee1ced6e10d312dc530f638f39f9bb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E87	11328 bytes

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