PDF malware analysis — malicious · ca9b5dd4a585a3fa

MALICIOUS

PDF

39.5 KB Created: 2020-09-16 12:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 106943ace68dfdae8c09420163e06dcb SHA-1: 87782fbc584bf1782d6d314e9b73607e7f0387de SHA-256: ca9b5dd4a585a3fa28dd6c52ffe310eb1b077f21d0cec861d9372a953d5e37ff

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to distribute malicious content. The primary attack pattern involves luring users to external sites via these links.

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.me/pify?keyword=bolc+army+reserve
- http://files.luminousobscurity.com/uploads/1/3/1/4/131406520/75c90591b293327.pdf
- http://files.near-perfection.com/uploads/1/3/0/9/130969332/defomarefidekivixog.pdf
- http://files.svtapatya.com/uploads/1/3/0/9/130969373/d1c74551cf364d.pdf
- http://tajos.m4achic.com/uploads/1/3/0/7/130740437/vuxaf.pdf
- http://files.everyday-regalia.com/uploads/1/3/0/8/130813988/1278045.pdf
- http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
- http://files.stonetreestudio.ca/uploads/1/3/2/6/132681910/borebuvasusujo.pdf
- http://files.republicoftexans.com/uploads/1/3/0/7/130775825/8330047.pdf
- https://static.usrfiles.com/ugd/2486b5_627617ccadc84c9e8e9387977f611528.pdf
- https://static.usrfiles.com/ugd/b7082a_500b0682811d478e9d5a4e6d867aa9de.pdf
- https://static.usrfiles.com/ugd/cc03df_c42cce1462a949a189900c6ed49c01e4.pdf
- https://static.usrfiles.com/ugd/895bef_7263561282544dba979ba3a5a7c01ca8.pdf
- https://static.usrfiles.com/ugd/5f226e_47c99bc4231b44bb85c39d922201f0b6.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005c71.bin` `1e631f7f5463a0b4cf4fa4242f43c8f0acea3959c86c4bdb343fbe273769b421`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C71	5156 bytes
`font_01_sfnt_off00006df4.bin` `75708efdff44f5c541ac15729830455128a0636aec389b7a52a488b2baea27ec`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DF4	10444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.