PDF malware analysis — malicious · 70db64654cd4388e

MALICIOUS

PDF

40.9 KB Created: 2020-10-30 06:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0c0808aa0a96c84eb2b7972724cfa86a SHA-1: 58c0477be1b93b70acebb12d37f81f4ead60fe6c SHA-256: 70db64654cd4388e50f1f1dc3bdaec4516d581c36069bb2654c9596ae7059330

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 malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://ttraff.ru/123?keyword=thomas+calculus+early+transcendentals+11th+edition+pdf, is a primary indicator of this malicious activity. The document's structure and content suggest it is part of a campaign to lure victims through deceptive search result appearances.

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://ttraff.ru/123?keyword=thomas+calculus+early+transcendentals+11th+edition+pdf
- https://cdn-cms.f-static.net/uploads/4373297/normal_5f88ee29acf13.pdf
- https://cdn-cms.f-static.net/uploads/4408599/normal_5f9920d85fc06.pdf
- https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/milusajeset.pdf
- https://cdn-cms.f-static.net/uploads/4403820/normal_5f963805893b4.pdf
- https://cdn-cms.f-static.net/uploads/4368478/normal_5f8ba6f6a93c0.pdf
- https://cdn-cms.f-static.net/uploads/4368741/normal_5f968410d288a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/7d931d72-d352-44bc-8173-18b61ddecb52/54025291546.pdf
- https://s3.amazonaws.com/lixuduwonifa/wiwovuwo.pdf
- https://cdn.shopify.com/s/files/1/0495/9712/0676/files/bifigolasazeliv.pdf
- https://cdn.shopify.com/s/files/1/0433/3889/1419/files/westin_brush_guard_ford_f150.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_off000061dd.bin` `721dea4a2ace7b521f6b0afe99c0d2a10e78cdedf2ca3b7513e123803ef22c71`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61DD	5500 bytes
`font_01_sfnt_off0000746c.bin` `457e4049bdacfff6d9022499c65a1cbf8c3b08e47377488807fc91d03b9dd555`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x746C	10124 bytes

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