Malicious PDF — malware analysis report

Static analysis result for SHA-256 696935583e991a1d…

MALICIOUS

PDF

40.1 KB Created: 2020-10-03 21:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d7f41117fac015817fd810f671ca7599 SHA-1: 875f793bbb1cdb7c67ef8993789d111ed80ea939 SHA-256: 696935583e991a1dd639f449624f8c9d3344a2bfadecbd9bcdb8904f13aacd74
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to lead users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, but the presence of many links points to a link-farming or redirection-based attack.

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 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=ophelia+piano+sheet+music+free+pdf In PDF document text
    • https://site-1039752.mozfiles.com/files/1039752/98025289625.pdfIn PDF document text
    • https://site-1037893.mozfiles.com/files/1037893/gakoga.pdfIn PDF document text
    • https://site-1038504.mozfiles.com/files/1038504/tevovuzesabuvubunelov.pdfIn PDF document text
    • https://site-1039129.mozfiles.com/files/1039129/xepojafenedarome.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/16840337870.pdfIn PDF document text
    • https://site-1037253.mozfiles.com/files/1037253/munedefa.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/dabopudovo.pdfIn PDF document text
    • https://site-1040143.mozfiles.com/files/1040143/texenej.pdfIn PDF document text
    • https://site-1039280.mozfiles.com/files/1039280/15498688584.pdfIn PDF document text
    • http://files.bodyandmindsolutions.com/uploads/1/3/1/8/131856224/negir-ridisexawagun.pdfIn PDF document text
    • http://files.minasbeautysupply.com/uploads/1/3/1/4/131436978/solijegewir-fanigokukib-mobubudi-fagaxigo.pdfIn PDF document text
    • http://tikalafu.aliciapsychicreadings.com/uploads/1/3/2/3/132302846/1454a57.pdfIn PDF document text
    • https://site-1038618.mozfiles.com/files/1038618/58136601616.pdfIn PDF document text
    • https://site-1039190.mozfiles.com/files/1039190/welujutuxunalemejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 5424 bytes
SHA-256: bc0c2e94af92e358dda02eb85327dfde32644a0b706bd8f2c00dd24ee5e5ef92
font_01_sfnt_off00007114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7114 10056 bytes
SHA-256: 1f51d2641896e5382ca0a89651f6717f69dcdd2273039bd143f451c2c859269d

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