PDF malware analysis — malicious · 16592117b07e1f05

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 20:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c94c1dd568182932b177152aa800678e SHA-1: fd9e6f879cdc3327930fbee5961051c4496ca8ca SHA-256: 16592117b07e1f05a32ed5c8f6b621a0738c4bb3c1afa2b5e2d55304a5e4582b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. This indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The presence of numerous external PDF links, many of which are benign, suggests a link farm or SEO manipulation tactic to obscure the malicious redirector.

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.com/wix?keyword=stardew+valley+gay+mods
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_ea766fa082de4f4b8f9cab86dc92a606.pdf
- https://static.usrfiles.com/ugd/b8c837_2ca350049c0a4c17966172f1d586d236.pdf
- https://static.usrfiles.com/ugd/dc8a8e_80fea5cef0c444b4885fee06e3df1b03.pdf
- https://static.usrfiles.com/ugd/b8c837_9279de599f68444c995f795baf3c8916.pdf
- https://cdn.shopify.com/s/files/1/0431/4670/7104/files/54273372491.pdf
- https://cdn.shopify.com/s/files/1/0445/6860/8927/files/79598832004.pdf
- https://static.usrfiles.com/ugd/b4a829_8d71171bbdfc41d4bdee423c8f0e044d.pdf
- https://static.usrfiles.com/ugd/576447_e49bf40056c14a569628fa2d91306919.pdf
- https://static.usrfiles.com/ugd/b8c837_71c8e5e109a04006817cee21205f8c08.pdf
- https://static.usrfiles.com/ugd/b8c837_faaa9bba884b4000ada154ba31778180.pdf
- https://static.usrfiles.com/ugd/b8c837_f123701d040f4e1290fc6ee77226c2f6.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_off00006a1e.bin` `5f452024a7574db199ad0f126b35d19b7489de39ebed137600d1cd547e117654`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A1E	5504 bytes
`font_01_sfnt_off00007cdb.bin` `1e1016c17d6a428aa110f2867106527ee92af117d8cf28041b5cfa9f52d9807d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CDB	10192 bytes

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