PDF malware analysis — malicious · b984a798f89b633d

MALICIOUS

PDF

39.7 KB Created: 2020-11-01 11:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4d79b2eb150b2577e968461ab8542ac7 SHA-1: 59e4dca107b0e11de2215d40fbd6161d190efd4b SHA-256: b984a798f89b633df2bc4c9bd8fe36c75f1a3274169f33ad82f007a73969b9e8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary goal is to redirect users to potentially harmful sites, possibly for SEO spam or phishing.

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/123?keyword=janome+harmony+8080+extension+table
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0497/2340/8545/files/82476680955.pdf
- https://cdn.shopify.com/s/files/1/0502/5549/5323/files/transforming_parent_graphs_worksheet.pdf
- https://s3.amazonaws.com/gajabedafot/marcus_theater_orland_park_times.pdf
- https://s3.amazonaws.com/bisegilupuf/benefits_of_students_reading_aloud_in_class.pdf
- https://s3.amazonaws.com/firigugixujotov/xuzixuwugunumajadok.pdf
- https://uploads.strikinglycdn.com/files/f3032408-f4da-4957-900a-ad2c03d20728/sindrome_constitucional_2018.pdf
- https://cdn.shopify.com/s/files/1/0478/6087/5430/files/45124477082.pdf
- https://uploads.strikinglycdn.com/files/2badba7f-bf28-4262-98fe-a012e5d6b967/xamodafomugufenivekerudo.pdf
- https://uploads.strikinglycdn.com/files/e10ebe29-d586-48c0-82b1-4df6f5155385/96727839440.pdf
- https://s3.amazonaws.com/gedimuta/sorenekujexaguriroval.pdf
- https://cdn.shopify.com/s/files/1/0435/3097/7434/files/geometric_algebra_for_physicists_chris_doran.pdf
- https://s3.amazonaws.com/tesodagiwor/waxakutiribafeburi.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_off00005b2f.bin` `9acd0165d8cb71fa73ced46ac1b824d445a4ee83c6127f676e7158a51725811c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B2F	5560 bytes
`font_01_sfnt_off00006ded.bin` `74bc31b8cac6868fc771219593eb86a3288abeb7e2d37ddbbe683909fa3558f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DED	10864 bytes

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