PDF malware analysis — malicious · 4ed2ad92433c63e8

MALICIOUS

PDF

43.7 KB Created: 2020-10-16 00:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 574f069140af5a1eece450f363f799d4 SHA-1: ee33465724370316004a6b1fdeb23a814cc194d3 SHA-256: 4ed2ad92433c63e82fa93bd34cc4cb1c3508fec172ca5547b026ebf2db46a27e

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious due to its function as a link farm, directing users to external URLs such as 'https://ggtraff.ru/pify?keyword=oxygen+concentrator+how+it+works+pdf'. The heuristics indicate it contains a mass of external PDF links, many hosted on disposable domains, suggesting an attempt to distribute traffic or lure users to potentially harmful sites. No scripts were extracted, but the nature of the links implies a phishing or redirection attack.

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://ggtraff.ru/pify?keyword=oxygen+concentrator+how+it+works+pdf In PDF document text
- https://site-1043381.mozfiles.com/files/1043381/lorafofonuduxovif.pdfIn PDF document text
- https://site-1043489.mozfiles.com/files/1043489/48278167100.pdfIn PDF document text
- https://site-1042106.mozfiles.com/files/1042106/59040881855.pdfIn PDF document text
- https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/5419754.pdfIn PDF document text
- https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
- https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/1021682.pdfIn PDF document text
- https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/webijilugubilexowoz.pdfIn PDF document text
- https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/9781852.pdfIn PDF document text
- https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/kuratimoja.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/9775e80f-3e91-4764-b429-d93d04e107d1/34943670972.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8e23ab18-e7ac-41a7-b9f1-607976b22e0f/zosefebe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/baaaad36-46ec-4cd7-8fb1-374c331589fe/mikuderijemasenawejovun.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4d172fb3-0740-4c29-8254-c04ebc444261/15594221785.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0440/5015/3622/files/gusovewuja.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9675/1771/files/human_fetal_growth_lab_answer_key.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/9472/8103/files/35849322151.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0501/4703/3258/files/aoandon_onmyoji_arena_guide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/5093/3156/files/viking_double_oven_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/5693/4297/files/kelty_sleeping_bags.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006bfe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BFE	5736 bytes
SHA-256: `12fe05a8beb0134aec6e67bd580a5d0c52f5767f6cb3bee24c245a17589c594f`
`font_01_sfnt_off00007f95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F95	9860 bytes
SHA-256: `5ffa667f965f5dada6373c8f8557219f9a9044ffa489585ef24d6a85251a1f56`

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