Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b36470a531af96…

MALICIOUS

PDF

44.9 KB Created: 2020-10-06 16:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 79aebf29c407a2cee85078327b24aee7 SHA-1: dd4c9b12fe15d786036b4b5db74d07399857a0e2 SHA-256: 96b36470a531af96001e7e3491b763304bb646e16b1341ca98aef5c57665b766
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure. One prominent URL, 'https://cctraff.ru/pify?keyword=chase+bank+debit+card+activation+number', suggests a phishing attempt related to bank card activation. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://cctraff.ru/pify?keyword=chase+bank+debit+card+activation+number In PDF document text
    • https://site-1038358.mozfiles.com/files/1038358/33419445271.pdfIn PDF document text
    • https://site-1041295.mozfiles.com/files/1041295/riwix.pdfIn PDF document text
    • https://site-1039140.mozfiles.com/files/1039140/93299096228.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/luxumawetedaruje.pdfIn PDF document text
    • http://befovu.dralisonpt.com/uploads/1/3/1/4/131406352/4de741ef8.pdfIn PDF document text
    • http://zarisav.jenniferclarksoprano.com/uploads/1/3/1/8/131856725/vanasubulesob-tumukexivok.pdfIn PDF document text
    • http://files.mbmcandrews.com/uploads/1/3/1/3/131398235/zifamegori-beditado-zikopopebok-losenuzoko.pdfIn PDF document text
    • http://bomujiz.archipelagoimages.net/uploads/1/3/0/9/130969627/2283136.pdfIn PDF document text
    • http://files.nwhsmsa.com/uploads/1/3/1/6/131636886/gefamijifamabeki.pdfIn PDF document text
    • http://pugupamuv.iglesiabautistalasflores.org/uploads/1/3/0/9/130969600/nolubin_zaxewugedil.pdfIn PDF document text
    • http://jugoj.hapasolutions.com/uploads/1/3/1/6/131606396/49519c0bb40.pdfIn PDF document text
    • http://www.fotolia.com''gt;fromIn 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/9e87f48b-4779-48be-9744-2c6e4729ee3b/pidapofasibozozotepanik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ce65ce-00c3-4869-8701-3d203a8e8395/betajotulosodexupuwod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c3d0bb4-2934-453d-a21d-85146acb4d61/tamosavopuxudoza.pdfIn PDF document text
    • http://www.fotolia.comIn 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_off000071f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F4 5316 bytes
SHA-256: efda4587cb333b6447a3b32ca8c9fbbd33cbc0564a932b0bb77cb136b0df4b24
font_01_sfnt_off000083da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DA 10268 bytes
SHA-256: 9fd5716ab3f70e0695d914fd665cf1332826da213259502396bd84d8f2ac1d1c

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