Malicious PDF — malware analysis report

Static analysis result for SHA-256 5643c76518ecebf2…

MALICIOUS

PDF

41.6 KB Created: 2020-10-16 12:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4d2fac41784a5f5062e0b4c73faeff43 SHA-1: 1b306d91ee71a006f030c9a298a9fd7eab9a5b5d SHA-256: 5643c76518ecebf25cfcb66079aac6de0b288520c135e1e60e352c233c7b7e89
184 Risk Score

Malware Insights

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

This PDF document functions as a link farm, presenting numerous external links to users. One of these links, https://gettraff.ru/123?keyword=snaptube+older+version+apk+download, is identified as a malicious redirector, indicating a high likelihood of leading to malicious content or downloads. The document's structure and the presence of a malicious redirector suggest an attempt to distribute potentially unwanted software or lead users to phishing sites.

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/123?keyword=snaptube+older+version+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f876d337f0c3.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/votalupop-zinimolowa-fililevipuf.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/6853752.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/4447094.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/f22694.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/3999753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f86f846107b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5f8824d3390d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f88c5e4519f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f878a003c579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f8721f7a1c43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6047/3241/files/74862173000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3622/7759/files/56146516654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3709/7625/files/charter_spectrum_code_408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6629/0076/files/fnaf_survival_guide_chica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/descargar_50_sombras_de_grey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/914b503c-ad0f-4703-a634-f77b68d121b2/44700118457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaab086b-6c21-4bca-a738-dfad750bd4bf/48016890150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf11e58-27b1-4072-9acd-9a243411f915/33101842680.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_off00006430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6430 5412 bytes
SHA-256: 12ba3b42901e86c1e9bc02b92b5562583b7fb49779fdde66678585dd834169ff
font_01_sfnt_off000076a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A6 10176 bytes
SHA-256: 3af9751a3f0de991b0aa615018f25dc097f784d4c2235e52c9173d6704ef2744