PDF malware analysis — malicious · 901c729519c92ea2

MALICIOUS

PDF

38.6 KB Created: 2020-11-03 20:35:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e635540f8809af2d614b5ed3179a3d81 SHA-1: d4567e2874f805aaa7ff44ccd39669455cd3b97c SHA-256: 901c729519c92ea28714c52f5a85912c957b4b3a2c150ab5a1202d8c40d6a3e8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm designed to redirect users to various external PDF files, with the primary link pointing to a known malicious redirector. The document body, though obfuscated, contains a URL that appears to be a lure for search engine optimization, aiming to attract users searching for local map information. The presence of numerous external links and a malicious redirector strongly suggests an attempt to lead users to potentially harmful content or further stages of an attack.

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://ggtraff.ru/aws?keyword=evergreen+lake+bloomington+il+map
- https://cdn-cms.f-static.net/uploads/4365591/normal_5f922b6743388.pdf
- https://cdn-cms.f-static.net/uploads/4387577/normal_5f8dea66856e9.pdf
- https://cdn-cms.f-static.net/uploads/4375708/normal_5f8e8be25edfa.pdf
- https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/6388709.pdf
- https://cdn-cms.f-static.net/uploads/4369506/normal_5f9b87428373a.pdf
- https://cdn-cms.f-static.net/uploads/4392864/normal_5f985c36b1ff5.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wisuw/fodirexekafo.pdf
- https://s3.amazonaws.com/juzinaramip/quasi_newton_method.pdf
- https://uploads.strikinglycdn.com/files/b793ac4d-3b44-4e43-a6b6-04685c4b99b1/20194774668.pdf
- https://uploads.strikinglycdn.com/files/310491b1-2208-4171-81c3-c3fb83ae01ca/burrito_bison_launcha_libre_hacked_apk.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_off000056ea.bin` `fab76be625a65082e534fdd9296234a94f51562258302bfb7f4c0a2defada763`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x56EA	5180 bytes
`font_01_sfnt_off00006882.bin` `82e01037e55b3f012162815922d9ff29354560dd4ef1f35ca4d2e125f09d42e5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6882	10932 bytes

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