Malicious PDF — malware analysis report

Static analysis result for SHA-256 449bc3c1e3c32047…

MALICIOUS

PDF

33.4 KB Created: 2020-10-11 22:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2257622a127d01769dd1aa371a3bd698 SHA-1: a03003de64b2e8bef6cdbd1e3318bee4c93aef44 SHA-256: 449bc3c1e3c320479239fdf857860573cab43d26438c98b0998d07c2f79c75e2
122 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The primary malicious indicator is the redirection to the URL https://ggtraff.ru/strik?keyword=dictado+para+quinto+de+primaria, which is likely intended to lead the user to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 3

  • 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.
  • 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://ggtraff.ru/strik?keyword=dictado+para+quinto+de+primaria In PDF document text
    • https://site-1039618.mozfiles.com/files/1039618/natexugejaku.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/vofeno.pdfIn PDF document text
    • https://site-1042886.mozfiles.com/files/1042886/timonujoboteweperitarive.pdfIn PDF document text
    • https://site-1043976.mozfiles.com/files/1043976/pinuzibizuz.pdfIn PDF document text
    • https://site-1038710.mozfiles.com/files/1038710/zifapavavitaja.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/fubifinepasuruwiwinejo.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/fukapikado.pdfIn PDF document text
    • https://site-1048253.mozfiles.com/files/1048253/zasedovisenig.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/ebd9116f-7c1b-48ef-97da-b5b968c20b41/pifugik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51026b7c-4056-4d8c-9744-ab2ec2afc8ef/lexepikuwukunari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abbefdd-e5b9-42a9-9378-375dba46c9ff/pimovobunel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/84797061165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/watch_aliens_online_free.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 5132 bytes
SHA-256: 02958bd91d4023607fe1688f89aabc56cc4fb08e02edb892b073ac8b7f35f6e8

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