Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95aab0138f71aad…

MALICIOUS

PDF

74.3 KB Created: 2020-11-13 04:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8759221be932e3d5895d56cf70cd85e6 SHA-1: 48811a211bb2ee1bc8acc3f9a8e0b38c3ad7e59a SHA-256: f95aab0138f71aad47605846dd96904313cf2f6965f4111c131e3223669afcee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector infrastructure, which is designed to trick users into downloading applications or visiting malicious sites. The embedded URL 'https://cctraff.ru/strik?utm_term=download+beetalk+for+iphone' strongly suggests a phishing or social engineering attempt to deliver a payload. The ML classifier and ClamAV detection further corroborate the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=download+beetalk+for+iphone
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5fad92db326bb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fa68e317-405d-4b52-ad42-ccb939360655/78613379201.pdf
    • https://uploads.strikinglycdn.com/files/169ed072-f926-44a9-b1c1-a06d191d455c/33992424548.pdf
    • https://s3.amazonaws.com/xarojapi/26481835932.pdf
    • https://uploads.strikinglycdn.com/files/dbf669cf-3007-4824-b6cf-aa85dc618fa0/pibinenone.pdf
    • https://s3.amazonaws.com/juvuraguvutoxif/cosmetics_types_and_uses.pdf
    • https://s3.amazonaws.com/gitipelut/41083660767.pdf
    • https://s3.amazonaws.com/vetamedisoz/24176885865.pdf
    • https://uploads.strikinglycdn.com/files/b1b0b3ff-ff03-4a2c-81ba-734c60a259b1/fortnite_skin_swapper_for_ps4.pdf
    • https://uploads.strikinglycdn.com/files/bf706f45-6096-4340-8577-ffcccc661286/first_lego_league_jr_core_values.pdf
    • https://s3.amazonaws.com/waxapoz/liars_club_mary_karr.pdf
    • https://s3.amazonaws.com/wivunonovef/96921948219.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caa3.bin
992f3636a6fafd5872cf53cc5e87d544485691b8fa8c3ed11739ad5399fecc98
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA3 6508 bytes
font_01_sfnt_off0000e0ec.bin
02a9d6864ddc8ce01c8cf9e09672f1c0cec9a2495dfef8252c3d99831ab2f6f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 5248 bytes
font_02_sfnt_off0000f2d4.bin
7eeb0151927dcfce74528e71f473ea5ca4259f9ac4d346676421ea115b5eed78
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 13788 bytes