Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4ac60d89575cfa…

MALICIOUS

PDF

38.5 KB Created: 2020-10-28 19:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8c79f09248abcc07a77b348402609986 SHA-1: 941b1d842e6f0ffd89006d974fdfe0846c45ee4a SHA-256: 5f4ac60d89575cfae83f5069240eb253ef6a41afa00910c3088234de738681a4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, functioning as a link farm. One of these links, https://cctraff.ru/strik?keyword=tomty+gaming+executor+v1.6+download, is identified as a malicious redirector. The document's content appears to be a lure for downloading software, indicated by the URL keyword.

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/strik?keyword=tomty+gaming+executor+v1.6+download In PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/1396268.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/8118875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f922dc1ba909.pdfIn PDF document text
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/7874188.pdfIn PDF document text
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/zanomorekunegim_fibuxu.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/modinijuwapeguk-mekonaxivul-mibimalefilonew.pdfIn PDF document text
    • https://jewuvasoseximu.weebly.com/uploads/1/3/4/3/134355154/1970934.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/sulawu.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/botinoluzisizuvi.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/799d7e9b-4a1b-4311-a451-4e00de3db022/39814186124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ce2601-fb66-4a3b-a383-ff21c1943939/domojatadadifiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d3c62c-03c8-4e5f-8c4e-70b350e12751/77224790583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4416/6049/files/gijareb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6424/8470/files/jikunelolowesenavide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7494/3676/files/metumob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f93ad18-d611-4360-8ec9-07907676b096/dituzodezibevalip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a5348d-7d02-41bf-b2c0-2088fb19a1a0/59298093236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2349/7877/files/harpa_crist_cifra_simplificada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/056e31d3-7aec-495a-b9e9-37b7610959e9/16857646948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94012cd-6c46-4cac-bdc5-9258f5e0587e/77449274741.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_off000052e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52E2 5592 bytes
SHA-256: 2feb689d43cb4b29f167da19e994556722b3157fb286beeb24ced7212169e7aa
font_01_sfnt_off000065ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FF 11528 bytes
SHA-256: f98d07dcb26a0e21af9688a7f366d1427aedf62442e6cc1275ee275c37cacc52

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