PDF malware analysis — malicious · 2b193f0bdf914393

MALICIOUS

PDF

46.4 KB Created: 2020-10-23 14:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28

MD5: 85617b726a46459df9db6abfa9dcdbe0 SHA-1: 252c87f6258f34e60697c0b4369db93569781a2d SHA-256: 2b193f0bdf914393b31dc5ee06178951716539657856b8c8896d8de8dfa7165d

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious due to its extensive use of embedded links, many of which point to known malicious redirectors or disposable hosting. The document body contains obfuscated text and multiple URLs, including a suspicious link to 'cctraff.ru' which is flagged as a malicious redirector. The presence of numerous PDF links suggests an attempt to create a link farm or distribute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://cctraff.ru/strik?keyword=stadtbibliothek+bad+pyrmont+findus In PDF document text
- https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/pisiwerewidivo.pdfIn PDF document text
- https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/4171977.pdfIn PDF document text
- https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/zoponosi-jawar-nozimixelibu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374009/normal_5f8fe5d8e60b1.pdfIn PDF document text
- https://baletepo.weebly.com/uploads/1/3/0/7/130776023/d5a2a3b4.pdfIn PDF document text
- https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/a1f59f1.pdfIn PDF document text
- https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/ec78fffbd8.pdfIn PDF document text
- https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/c13e86f135.pdfIn PDF document text
- https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/12fa7.pdfIn PDF document text
- https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/2c4c19.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/d4e164ef-ec19-4a2d-93bf-c197a384b6ac/yo_gotti_white_friday_mp3.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/61eea719-b54d-463a-b34f-751a78d30f87/93827940945.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/586943bc-f300-44a1-81ff-feef07ce4b9e/ripefatusarizepagifuxupe.pdfIn PDF document text
- https://s3.amazonaws.com/mulerux/ascaridiase_artigo.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/nutrition_subway.pdfIn PDF document text
- https://s3.amazonaws.com/gupuso/arduino_simulation_with_proteus.pdfIn PDF document text
- https://s3.amazonaws.com/gifojuxaxeva/catholic_symbols_and_meanings.pdfIn PDF document text
- https://s3.amazonaws.com/gupuso/52714728113.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006682.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6682	5692 bytes
SHA-256: `787c76908de914bd555fe45248df841ae57719897da12f171f096308f91dd472`
`font_01_sfnt_off000079a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79A5	2008 bytes
SHA-256: `8a14df1d83f560142c566df1a0cb95609475f8b686880bd0196c5a46eda1ad3f`
`font_02_sfnt_off000082f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x82F7	12232 bytes
SHA-256: `3504261b6bf297a70cd59f8248733f03529f22b541e4f1945f9715f865b780fb`

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