Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cbb1496197719c…

MALICIOUS

PDF

43.3 KB Created: 2020-10-11 05:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 97b88c968613839a714c6c4752096b84 SHA-1: b09f85c3c3982e365cf2abef017d34ee59c8fedc SHA-256: b3cbb1496197719c4fb41720a37c07623e0635cb6fbe453500b0f4cb26a1e0e9
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://ttraff.club/pify?keyword=apply+texas+essay+word+count In PDF document text
    • https://site-1040141.mozfiles.com/files/1040141/gedazibamimozisamedux.pdfIn PDF document text
    • https://site-1038341.mozfiles.com/files/1038341/mufubaxop.pdfIn PDF document text
    • https://site-1039289.mozfiles.com/files/1039289/23522899254.pdfIn PDF document text
    • https://site-1038684.mozfiles.com/files/1038684/letuxosixewivazegop.pdfIn PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/64264318271.pdfIn PDF document text
    • http://mubapujo.stmonicasparish.com.au/uploads/1/3/1/3/131380005/turoduvutimefaruwab.pdfIn PDF document text
    • http://files.vision-destinations.com/uploads/1/3/0/8/130815058/e5e9e7edee.pdfIn PDF document text
    • http://files.twfd46ny.com/uploads/1/3/0/7/130739528/pukixudalizefo-kafivexage-werenutur.pdfIn PDF document text
    • http://sabetudu.mizunagardens.com/uploads/1/3/0/8/130814070/6651835.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/1/0435/8642/0893/files/65710900279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4217/1797/files/labeled_blood_cell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/selebozukeboseginugujizu.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_off00006c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C76 5320 bytes
SHA-256: 8cf2a509fc5c7fce9c40d77915adec228d135c31c4bebc29cb8dafb12fbaea85
font_01_sfnt_off00007eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAE 9936 bytes
SHA-256: 5c32ab7ebe9f809026f964ba281d0d0cb5ba8db7401841b3fe78356ebb3597cd