Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d3e0a952ae41ebb…

MALICIOUS

PDF

60.7 KB Created: 2020-12-04 02:21:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6727ad427c75d51ea1dd0c4cefc648 SHA-1: 3b24a55136ec9ba7d0b783672e9cbcc5957e187b SHA-256: 8d3e0a952ae41ebb5b4c8a2720e1628c5bed32b3173d8d6699e0420ad6cb9bf3
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, trafffi.ru, which is likely used to host a malicious payload or phishing page. No scripts were extracted, but the presence of the external URI and the high confidence detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=walter+the+farting+dog+goes+on+a+cruise
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5fa6ff57a9eae.pdf
    • https://cdn-cms.f-static.net/uploads/4411702/normal_5fad9faa976fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/49d0d70d-c0fc-4516-a89f-60a711b69a9f/nelodadef.pdf
    • https://s3.amazonaws.com/rupatojuko/24862125276.pdf
    • https://s3.amazonaws.com/juvetaso/channel_8_news_dallas_investigative_reporter.pdf
    • https://uploads.strikinglycdn.com/files/f45bfc90-f91e-41fa-8d49-a786dfda2c2f/avatar_korra_2.sezon_trke_dublaj_izle.pdf
    • https://uploads.strikinglycdn.com/files/baa75f77-5e98-4a63-835b-55136c2cc322/tigard_swim_center.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd09f964be903ae6422294/1606224377817/64563104663.pdf
    • https://static1.squarespace.com/static/5fc5abc8084698658e7ee89a/t/5fc97b5919890c408b212beb/1607039833714/rio_theme_song_road_edm_dancing_girl.pdf
    • https://uploads.strikinglycdn.com/files/198f393b-c951-46cb-89c8-b2591d305d03/36751464940.pdf
    • https://s3.amazonaws.com/fewunadupop/kakaostory_for_windows.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.

FilenameKindSourceSize
font_00_sfnt_off0000b179.bin
4dbea7ee1ffd7aa02cc17f8815fd1209229ebc6ba823ce8fb07cd0f7ba0924e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB179 5296 bytes
font_01_sfnt_off0000c38b.bin
365de239533796296c07b0df773e4a0c1a50bc8e63c6fe0ce4b83aedbd249854		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC38B 10244 bytes

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