Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8b539ea61207c6…

MALICIOUS

PDF

65.8 KB Created: 2020-12-16 16:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6e9ddd9b49e9857f4273ef57ca1b568e SHA-1: 2f7d27e56e13f2f9611caa16b1a2a017514af097 SHA-256: ae8b539ea61207c670f70c271eb60e627715216817c47dca92d8ba19ae3e7e8c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'trafffi.ru', which is likely a malicious domain used to host or redirect to a secondary payload. The document body, though heavily obfuscated, appears to be a lure related to search terms, aiming to trick users into visiting the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=gilbert+and+sullivan+operettas+about+a+curse PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466679/normal_5fd67b6a7ec84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8817a361248.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xamapebonijos/consumer_reports_digital_login.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/voxapejujituzel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5740abdb33045eee0e015/t/5fd746a6b1c3f31c7a9e1cec/1607943848754/92576857269.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/willpower_baumeister.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d39eecfe-89f2-4a38-bd9b-16c40a9ae4e7/giancoli_physics_6th_edition_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f4a62e34347c70445090/t/5fc2fefc3f75b16643374b98/1606614785427/47964936412.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc2e4c33c02f22b9d6cd5ff/1606608069779/wupuwujobagodisatolij.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54f4bf7cf8c754047fa56/t/5fc6a0f561e25426e1212073/1606852854395/teppanyaki_buffet_phone_number.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f88bd26ff1194f740ef3/t/5fc9fa20cf87d0256ff119c0/1607072290459/hearts_card_game_online_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad99831-dcc6-49a4-a46e-9b00171f0b74/trivia_crack_mod_apk_unlimited_lives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76baffdf-955e-42a1-986b-d53fb8f0e362/wosaripipiferuburu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6EA 5180 bytes
SHA-256: 934057eed9e829108a53b6709e4f7b1e27f4095a5785e846a69ee0f2dbe8d834
font_01_sfnt_off0000c895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC895 10488 bytes
SHA-256: 0212ac49af1a89f82afb2afbef79e7a7175a520b6b7697d58fd50bf7c7a3589d
font_02_sfnt_off0000ec2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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