PDF malware analysis — malicious · 91f9d554d55826d7

MALICIOUS

PDF

37.8 KB Created: 2020-09-07 02:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e5a7b78b122c34cf8f721f8197c44481 SHA-1: d098c2c2d48e6a30ee11efc2070335041d0409aa SHA-256: 91f9d554d55826d77ff5acdbdb95cec0aa68252ab2fda27b16d5fb6838fc342c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL. The primary intent appears to be redirecting the user to a malicious site, likely for further exploitation or phishing.

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=free+table+templates+for+wordpad
- https://cdn.shopify.com/s/files/1/0427/5198/3772/files/pekigejaxotegukokakoli.pdf
- https://cdn.shopify.com/s/files/1/0434/2605/4306/files/gunud.pdf
- https://cdn.shopify.com/s/files/1/0429/7441/2949/files/zoxefitabepekaxajawoja.pdf
- https://cdn.shopify.com/s/files/1/0429/3600/8870/files/masuwubowuje.pdf
- https://static.usrfiles.com/ugd/73f3b0_da0f132683134e9aa943adb773a2e452.pdf
- https://static.usrfiles.com/ugd/39a0fd_85b4a074f919453a83f9e0f1ac04ae2a.pdf
- https://static.usrfiles.com/ugd/1479de_07a4da97b1b74a0ab30ea6dae0ec69e5.pdf
- https://static.usrfiles.com/ugd/dc6899_2d18b58f56544541a1f88fad341bb14f.pdf
- https://static.usrfiles.com/ugd/740d8c_f5c53bdf0a584218a1cab529535cb5a5.pdf
- https://static.usrfiles.com/ugd/e0d0cf_f0ed415148df4d34ae6bd3344c2aaa6e.pdf
- https://static.usrfiles.com/ugd/5ea4d5_722656231d3c4f1bafd52014b33ced8d.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/
- https://static.usrfiles.com/ugd/73f3b0_da0f132683134e9aa943adb773a2e45

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000057bd.bin` `6e2e03a9806da70ab04c6d88a8d29dbfeb7b1113fbf0ca65ae988ed66be7c6c3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x57BD	5376 bytes
`font_01_sfnt_off000069fa.bin` `79fb670c03b7ad790e6857bd69bcc471a6a43cc599de5f641a9ee535e26716d0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x69FA	9512 bytes

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