PDF malware analysis — malicious · 8818b53a96c01782

MALICIOUS

PDF

41.6 KB Created: 2020-08-22 20:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 872d0e172411bca6110e85ac6a4795b7 SHA-1: 719e8b83537094da78852567afd3ea1afb5abbd2 SHA-256: 8818b53a96c017825e43f83e6bdc18d2d8fc87c154009148257235ab1ebf9d34

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'conga drum sheet music' and a URL that appears to be part of a link farm designed to manipulate search engine results. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=conga+drum+sheet+music
- http://gavijaz.reikibyleslie.com/uploads/1/3/1/6/131606875/jaliz.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0440/7122/3446/files/13313388764.pdf
- https://cdn.shopify.com/s/files/1/0431/6141/9927/files/37266785738.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafitizeruzu.pdf
- https://cdn.shopify.com/s/files/1/0431/9268/0611/files/levak.pdf
- https://cdn.shopify.com/s/files/1/0432/2990/5058/files/weekly_agenda_template.pdf
- https://cdn.shopify.com/s/files/1/0430/6649/1031/files/affairscloud_current_affairs_june.pdf
- https://cdn.shopify.com/s/files/1/0431/0653/3527/files/present_perfect_just_already_yet_ever_never.pdf
- https://cdn.shopify.com/s/files/1/0431/1223/5174/files/94806022709.pdf
- https://cdn.shopify.com/s/files/1/0439/4736/0424/files/wumipure.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005dc6.bin` `28a4ea10079f27090fdefe6290b23ce21b2d43e72429e56bbb2d6b390a1e3e34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DC6	5224 bytes
`font_01_sfnt_off00006f55.bin` `bfba50ad4feeef2c19d4e06de581bdd1d0139814ede4844fc3850d755643d398`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F55	1636 bytes
`font_02_sfnt_off0000778d.bin` `34d94876b8b3ece6321ac2d8795fa3177971201c4c3ab306ffcc6a60509411fd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x778D	9976 bytes

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