PDF malware analysis — malicious · 8b3460dd5707d138

MALICIOUS

PDF

49.2 KB Created: 2020-09-01 03:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d800cfd8346ad8e89afd649f77820191 SHA-1: d06892cf68a3f8c721f4b3e2fa42f979d34aacce SHA-256: 8b3460dd5707d1388d676a37febc3ff2419c6ca637a86557608299d5e63aeb22

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=acmyc+tamil+bayan'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The presence of the redirector URL suggests an attempt to lure users to a malicious destination, likely for phishing or malware delivery.

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.me/wix?keyword=acmyc+tamil+bayan
- https://cdn.shopify.com/s/files/1/0427/5296/6812/files/68402192803.pdf
- https://cdn.shopify.com/s/files/1/0428/7922/1919/files/eyes_emoji_text.pdf
- https://cdn.shopify.com/s/files/1/0434/4800/8866/files/xedudawakogevavibudi.pdf
- https://cdn.shopify.com/s/files/1/0434/3093/6733/files/77056964297.pdf
- https://cdn.shopify.com/s/files/1/0432/8767/5036/files/35289291040.pdf
- https://cdn.shopify.com/s/files/1/0429/2568/6951/files/gaxujomewajos.pdf
- https://static.usrfiles.com/ugd/f63f29_f1f088e39608489aa4526f2f9c6ec8d5.pdf
- https://static.usrfiles.com/ugd/9e53d4_1e67e9aca3b24646a6797d768024256f.pdf
- https://static.usrfiles.com/ugd/09273f_161c5472cc404401a304502bd9ef9300.pdf
- https://static.usrfiles.com/ugd/47b1e8_39b1885e2c2b4e8d9b47b44c8fb73458.pdf
- https://static.usrfiles.com/ugd/34e21e_fa682d9d23d14d888e9e63345bd4aa00.pdf
- https://static.usrfiles.com/ugd/b8c837_ad01e4458ed1442e9f2792d5686f9ff2.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000078a6.bin` `0e3e0d10a47d2a305da73097200c53811437bbb98e27088e10c92881268c6971`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x78A6	4904 bytes
`font_01_sfnt_off0000894f.bin` `336c103e4c6d920a3b080d473773a39d8cc5dd456c8d5ff0694002fc8d7813f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x894F	15068 bytes

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