PDF malware analysis — malicious · 7d4d956be36a27d8

MALICIOUS

PDF

43.5 KB Created: 2020-09-01 10:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c7b0972890378418c4d9a6e65a585e9d SHA-1: 295fc99a85f068f8994249867b5cfaa1b3750723 SHA-256: 7d4d956be36a27d8619f8c4197ebbe00555f663f87d08365967ca63ccb90d5ab

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a malicious redirector link disguised as search results for popular content. The document also hosts a large number of other PDF files, likely for SEO manipulation or to obscure malicious activity. The primary malicious IOC is the redirector URL, which is designed to lead the user to further malicious content.

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.ru/wix?keyword=nicki+minaj+chiraq++free
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/e7e4a0_1a6bdd91f4d74c3b9f08944cd7a6d028.pdf
- https://static.usrfiles.com/ugd/12dc78_f1bdf5f311bc4b23a3f61ae32f938550.pdf
- https://static.usrfiles.com/ugd/e2c250_9db2b261b7184f3c8fbd3edaaf1e33c5.pdf
- https://static.usrfiles.com/ugd/b5472a_9d760720c90948d494dd3e3aeaa41712.pdf
- https://static.usrfiles.com/ugd/6a7407_65c2f9f0daf54408aaf4bf2dddc21677.pdf
- https://static.usrfiles.com/ugd/493135_1aa84dd49b50450cb5bc6da4b799664f.pdf
- https://static.usrfiles.com/ugd/3eed2b_11e85de8e500436cb7a58c930555d25e.pdf
- https://static.usrfiles.com/ugd/b8c837_d2926d081a0b4804869815776620426b.pdf
- https://static.usrfiles.com/ugd/b8c837_686d7e1507834feaa6062da4f1634f69.pdf
- https://static.usrfiles.com/ugd/b28561_536507644d3f4ae7a8f32555878f48b8.pdf
- https://static.usrfiles.com/ugd/917232_4297d6c0d4b34c058b267d8c3c711fdf.pdf
- https://static.usrfiles.com/ugd/9c43ec_8b9ec5aeba304bada7061c938261078e.pdf
- https://static.usrfiles.com/ugd/0f1814_916757b6de5848429fd292c70e339f7d.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_off00006cf1.bin` `9a281e69beed4e5ad8885e3aedc81ff4f92d6442a4dd4a010ba47bbe935796c0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CF1	5144 bytes
`font_01_sfnt_off00007e5d.bin` `66eccca903615a5120b3f903fb1a3c5a1abc5efa897dfab92302c7d6d0f00493`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E5D	10364 bytes

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