Malicious PDF — malware analysis report

Static analysis result for SHA-256 473dbab5072339fc…

MALICIOUS

PDF

58.7 KB Created: 2020-10-08 19:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 052861ba3416dfcb6ba8b970f4e4a9aa SHA-1: e5d01f6b429d12c3d7eda6ebd5ef62fdc6cf2d50 SHA-256: 473dbab5072339fc0b27f726d446a7c4494403e9c8beca372f6f785c0608813e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm for SEO manipulation or malicious redirection. The primary URL, 'https://gettraff.ru/strik?keyword=versailles+palace+virtual+tour+worksheet+answer+key', suggests a lure to trick users into clicking through to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?keyword=versailles+palace+virtual+tour+worksheet+answer+key In PDF document text
    • http://files.starsinajar.org/uploads/1/3/1/1/131164236/cab354bb7.pdfIn PDF document text
    • http://tixak.bonedesigns.com/uploads/1/3/1/6/131606289/2347443.pdfIn PDF document text
    • http://parelosu.outbackequines.com/uploads/1/3/0/9/130969335/xigus-ruxugixonemujuz.pdfIn PDF document text
    • http://zazoj.paintandwinealbuquerque.com/uploads/1/3/1/4/131437615/4653384.pdfIn PDF document text
    • http://files.thewardrobeclothing.co.uk/uploads/1/3/0/9/130969214/1985501.pdfIn PDF document text
    • http://sufizifu.rmelectricsolutions.com/uploads/1/3/1/3/131379121/zagifi_loxeb_wulusif.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/mefulozegesefolij.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/93410190293.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/kidatoriderebevipiko.pdfIn PDF document text
    • https://site-1038583.mozfiles.com/files/1038583/12362307410.pdfIn PDF document text
    • https://site-1037897.mozfiles.com/files/1037897/nasepugonuzupupikokodiwu.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/gazumuwulurebumedu.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/rowozowizodotaxigavamo.pdfIn PDF document text
    • https://site-1043257.mozfiles.com/files/1043257/19042686364.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DB 5588 bytes
SHA-256: 4faf7b0db3e48dbf905b28e7a047c93aa9a8e9a9f3c0422dd6b6fea8c2cb5464
font_01_sfnt_off00007c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C67 5188 bytes
SHA-256: 1649df3e88b6a22e61694a0eaccc54ed7013e560465c2389017b1cae3a9833c2
font_02_sfnt_off00008e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E14 11944 bytes
SHA-256: 5426a2e239c7e9d33e777ac75a38ceb569ad3397f4e9e782b0f58962140e2c7b
font_03_sfnt_off0000b702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB702 16612 bytes
SHA-256: 175e137fd50af1b7b0d2adcab8f81bbe603250dc7735404458028ca820628cb3
font_04_sfnt_off0000ce21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE21 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361