Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ae1373ddbf3980…

MALICIOUS

PDF

38.9 KB Created: 2020-10-01 10:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 398ee7051678c6fdc03c181397cb417b SHA-1: fb26a16f4de3a5da41913ef1b1dd242e4112c704 SHA-256: a0ae1373ddbf398043dec7770469a8f22d974ffdb1a1db5a7bfe047d8a8a5da0
124 Risk Score

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=math+quiz+questions+and+answers+for+class+9+pdf In PDF document text
    • http://tisuvi.theoraamericanbulldogs.com/uploads/1/3/1/6/131637131/7784662.pdfIn PDF document text
    • http://files.humblemonkbrewing.com/uploads/1/3/0/7/130740522/3080442.pdfIn PDF document text
    • http://files.chile-powder-adventures.com/uploads/1/3/1/6/131607062/087acf.pdfIn PDF document text
    • http://jopewo.theblackoutfitness.com/uploads/1/3/1/3/131383544/6420557.pdfIn PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/68687477098.pdfIn PDF document text
    • https://site-1038938.mozfiles.com/files/1038938/10369662914.pdfIn PDF document text
    • https://site-1038796.mozfiles.com/files/1038796/25629270320.pdfIn PDF document text
    • https://site-1038916.mozfiles.com/files/1038916/refupazilosoxutu.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/50215928881.pdfIn PDF document text
    • https://site-1039525.mozfiles.com/files/1039525/96440687669.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/ditivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a741d47b-65fb-4f45-bc0e-e3963ca52527/55909596540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5984fe4-885a-4254-978b-8a45bb535a2e/86462522354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30bd2981-ecd5-4d43-9984-9a8f964f6c8a/pobuvimedogirotuvu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000579e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x579E 5672 bytes
SHA-256: 7cd4d0611877f2ba8ef0b18efcddf1646c4c4a2d7235f0900a8118155577ce82
font_01_sfnt_off00006b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0A 10488 bytes
SHA-256: fec0015be2fffff42a3b00d0529811dac951f20defa1b6026fa6b1dc0d6a15d2

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