Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ba3b31b98889c8…

MALICIOUS

PDF

42.0 KB Created: 2020-10-06 14:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4b4f38d28ab43009d7fc10f2e10d61dd SHA-1: fd8ab12f59ce07a866903e11c86b0af0508f95da SHA-256: d3ba3b31b98889c810d1afc8def13872b329364bc5af5afdb9f0d77999a15607
184 Risk Score

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/pify?keyword=identify+like+terms+worksheet In PDF document text
    • http://vamemo.bulldogtragician.com/uploads/1/3/1/6/131606227/pogelu.pdfIn PDF document text
    • http://files.simonperathoner.com/uploads/1/3/1/4/131437604/b3845e73b926aa.pdfIn PDF document text
    • http://files.baymediaproductions.com/uploads/1/3/2/7/132710569/f650d.pdfIn PDF document text
    • http://sozini.thsfrenchexchange.com/uploads/1/3/0/8/130814328/266756.pdfIn PDF document text
    • http://files.vangoldenprinting.com/uploads/1/3/1/4/131453274/ff97caf71.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/takuwonadutevajusadimugi.pdfIn PDF document text
    • https://site-1039893.mozfiles.com/files/1039893/zanatekugu.pdfIn PDF document text
    • https://site-1039958.mozfiles.com/files/1039958/92219032892.pdfIn PDF document text
    • https://site-1041413.mozfiles.com/files/1041413/65022740141.pdfIn PDF document text
    • https://site-1037205.mozfiles.com/files/1037205/38494732255.pdfIn PDF document text
    • https://site-1039564.mozfiles.com/files/1039564/43774598777.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/cc0947a2-a12b-4a9e-b852-d1493165c472/mezuzagojokoregugamovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2763b77d-db34-49c8-adb1-206801a6f4f6/zezupen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79aebab3-7929-4318-9bfa-24afe4e1f0cd/somujasutezukojasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d30437b-f9bf-4da7-9514-fb7db83fd10d/bitexoredazeluz.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_off000066bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BC 5132 bytes
SHA-256: b028ace7b19ffed6d5cba4fdabb3a6dcadcd980bf01efd1543b7ccbd20706498
font_01_sfnt_off00007824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7824 10252 bytes
SHA-256: 5dca55a54895f5aee9c73018293e34d4e4ae00c3b69c0272a6886b6b8728739d