PDF malware analysis — malicious · f24c8c01637fdf81

MALICIOUS

PDF

76.2 KB Created: 2020-10-15 00:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17

MD5: 51b0e40c81d2968d7b35caedd88ccfff SHA-1: 2e9ef3968bee94d14e892ec3e9bda11475373e4c SHA-256: f24c8c01637fdf81331c150d38a1c5372311ad153fe7bb04a0151f54a066962b

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://cctraff.ru/pify?keyword=rogue+fable+3+guide', suggesting a phishing or scam attempt disguised as a game guide. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=rogue+fable+3+guide In PDF document text
- https://cdn-cms.f-static.net/uploads/4366388/normal_5f8712319ddcc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365612/normal_5f87085c19f26.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366369/normal_5f876a115642f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366035/normal_5f8732e9eb993.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366348/normal_5f876817d2b07.pdfIn PDF document text
- https://site-1036858.mozfiles.com/files/1036858/mosonojebudo.pdfIn PDF document text
- https://site-1042889.mozfiles.com/files/1042889/49923487715.pdfIn PDF document text
- https://site-1039509.mozfiles.com/files/1039509/81694965460.pdfIn PDF document text
- https://site-1039478.mozfiles.com/files/1039478/fefavenawed.pdfIn PDF document text
- https://site-1038635.mozfiles.com/files/1038635/53323392430.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366036/normal_5f8727996c3d3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366043/normal_5f87242a3b372.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366317/normal_5f873213d6f25.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366389/normal_5f875d2bc4d34.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/8bd9d64c-2e23-435c-9954-aa756082ca94/nupajinu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/611ea66f-9ea6-4d16-b1f9-48b50a40b46c/jevojegezov.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/24a5459f-aa06-46c9-87e3-81e795cb86e7/dirime.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/44d67896-db04-4658-84bc-419c0a128c36/78178569061.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0495/9685/8531/files/vikesinetix.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/7589/3918/files/ripowibizerute.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_off0000e0f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0F9	4808 bytes
SHA-256: `7a71f5d18b4ff2ab0877adec5bbc388da7a29a8ac9d9e3637d8b535e58bf51fb`
`font_01_sfnt_off0000f164.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF164	10700 bytes
SHA-256: `db1d7b669c642f0a4a1cbf5281591e2ac05512502d3b653aafb633a7e7fe408d`
`font_02_sfnt_off00011558.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11558	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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