PDF malware analysis — malicious · a89e9c6361293691

MALICIOUS

PDF

47.1 KB Created: 2020-11-06 09:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d306b8011e804e6185c5f2509f16c7d4 SHA-1: 0170860a52fba0e115f0e7f7a0c3f597095b3192 SHA-256: a89e9c6361293691ad80a8c0d9249d87642004ced224ee0e4116dae8f28e0ca3

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?keyword=horntail+guide+maplestory'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded link is sufficient evidence of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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://traffmen.ru/123?keyword=horntail+guide+maplestory
- https://cdn-cms.f-static.net/uploads/4426966/normal_5fa0491cc1191.pdf
- https://xavujome.weebly.com/uploads/1/3/0/7/130739328/supokotivudasupodox.pdf
- https://cdn-cms.f-static.net/uploads/4421782/normal_5f975201dc8c3.pdf
- https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/vesoruzabidoxe_gotos_xaduradizozasoj.pdf
- https://cdn-cms.f-static.net/uploads/4366388/normal_5f87f3ff3c8d9.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/rebomedug/bargaining_councils_in_south_africa.pdf
- https://uploads.strikinglycdn.com/files/ac79f093-2f31-42ed-a74f-f3c6311bbb80/67035890051.pdf
- https://s3.amazonaws.com/vavale/561372394.pdf
- https://s3.amazonaws.com/fasanag/86304412080.pdf
- https://uploads.strikinglycdn.com/files/7c32b687-5807-4bd7-b9f8-860ca2b8db8b/scp_thaumiel_class_meaning.pdf
- https://s3.amazonaws.com/zirojopemup/nafew.pdf
- https://uploads.strikinglycdn.com/files/8365ac10-b11d-4a62-bec1-fe8a9c04c25c/72461916440.pdf
- https://s3.amazonaws.com/robumuduluwise/mavafakamopawutasimam.pdf
- https://uploads.strikinglycdn.com/files/ddad5893-9970-4687-9271-988fe849c724/vugexuwu.pdf
- https://s3.amazonaws.com/xurixado/86063586642.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_off0000774b.bin` `3b2bee03b197f0e0a7b14bfab3de34355321afaf96764acb676ad08157b1bf32`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x774B	5340 bytes
`font_01_sfnt_off00008964.bin` `3e04e08b88fff268f917de4e2a77c983e80483ef09589cb8f570698dd4730d21`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8964	11348 bytes

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