PDF malware analysis — malicious · 6cef03b2424bc2eb

MALICIOUS

PDF

84.1 KB Created: 2020-08-14 02:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 37645cd99738ac6cfef3e38090bb45c7 SHA-1: a6442afd7c93ce5a0e558f26316ec6d9033062f6 SHA-256: 6cef03b2424bc2eb06dcb5a27d55f674430aa50f6b03343290349641527ee3de

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to redirect users to malicious content, 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.com/pify?keyword=kinesics+pdf+free
- http://gamotiziz.vadoseorchid.com/uploads/1/3/1/3/131398091/velojavazu.pdf
- http://files.adiyadoni.com/uploads/1/3/1/4/131437308/86302.pdf
- http://files.melsellsparadise.com/uploads/1/3/0/7/130740138/2142499.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0430/1769/9477/files/pizemosizegusuxesanorubij.pdf
- https://cdn.shopify.com/s/files/1/0435/2484/9815/files/32702257271.pdf
- https://cdn.shopify.com/s/files/1/0428/7227/5103/files/6782264717.pdf
- https://cdn.shopify.com/s/files/1/0427/9681/0396/files/95152732414.pdf
- https://cdn.shopify.com/s/files/1/0448/1482/7677/files/32644751728.pdf
- https://cdn.shopify.com/s/files/1/0432/6070/6971/files/15021823248.pdf
- https://cdn.shopify.com/s/files/1/0432/8616/7702/files/gomasufudotiw.pdf
- https://cdn.shopify.com/s/files/1/0429/2257/3990/files/weronow.pdf
- https://cdn.shopify.com/s/files/1/0431/5407/9904/files/36499078158.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_off0001109e.bin` `5554c703f7f9b7eafad03f248678f452f894d0c5c2bbfc44b6c0ca38e5cc1658`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1109E	4876 bytes
`font_01_sfnt_off0001214a.bin` `6d1aca89b35e6b48ae1850f2c3fa7d6e0de90c488634296b6c75d4c227564317`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1214A	10112 bytes

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