PDF malware analysis — malicious · 058a499973892a54

MALICIOUS

PDF

37.5 KB Created: 2020-08-31 07:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0075445c797644cba5286c9a3a1f9dd4 SHA-1: cae6be84dbac2155017074689f2e8f9b7d048373 SHA-256: 058a499973892a54378840611493c1d406caeecc8c4a252c2eeca7ac44a88c7d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=le+proces+du+loup', which is flagged as malicious. The presence of numerous other PDF links suggests a link farm or a method to obscure the true malicious destination. 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/wix?keyword=le+proces+du+loup
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/1425/7820/files/1075909121.pdf
- https://cdn.shopify.com/s/files/1/0427/8861/8396/files/putan.pdf
- https://cdn.shopify.com/s/files/1/0427/4513/5260/files/2271952964.pdf
- https://static.usrfiles.com/ugd/dba42a_31f84a2bd8ee4eabb6256cffd592c2d8.pdf
- https://static.usrfiles.com/ugd/934fc3_071747a2ffb6413ca1b7f1a8c466c20d.pdf
- https://static.usrfiles.com/ugd/fef806_2583a13074834244b2967e2157c05db8.pdf
- https://static.usrfiles.com/ugd/0a0016_5e81c1b6a9a44aff814a2dfc05de742d.pdf
- https://static.usrfiles.com/ugd/9b5f63_da5f00b5d68d4e40bdc29baf7f9edc38.pdf
- https://static.usrfiles.com/ugd/0df15e_fc56eb4212ff4c818322fd87a8edbaa0.pdf
- https://static.usrfiles.com/ugd/b8c837_9977ce3c087b4c299ea0255220b1c1a2.pdf
- https://static.usrfiles.com/ugd/565485_32e11be943034af6b26dd2001e699969.pdf
- https://static.usrfiles.com/ugd/b8c837_6f843f2230d04802a9bf72260ef7aaef.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_off00005216.bin` `af3f24f293bd59239f5810cab28771639e06f724658080636139fb9b697a1abd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5216	4800 bytes
`font_01_sfnt_off00006276.bin` `7c58d942ee5547f3579dc2fd519779dac88a17febf27b2297148fca289a38159`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6276	12000 bytes

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