Malicious PDF — malware analysis report

Static analysis result for SHA-256 1132f61547fe4605…

MALICIOUS

PDF

37.4 KB Created: 2020-10-13 12:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a85acdc48b47214018b3bd9ed1432dd6 SHA-1: 0a1c916ca341bb88e57a9a9ac6e9d41c3f9ca9e1 SHA-256: 1132f61547fe46050ab8913b358c98b73877052cd116f405fbd2ddac8752af66
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gettraff.ru/strik?keyword=ayat+e+shifa+pdf+download In PDF document text
    • https://site-1039778.mozfiles.com/files/1039778/rezovokufidabomuvi.pdfIn PDF document text
    • https://site-1042101.mozfiles.com/files/1042101/16898715477.pdfIn PDF document text
    • https://site-1042191.mozfiles.com/files/1042191/56884915917.pdfIn PDF document text
    • https://site-1043666.mozfiles.com/files/1043666/3714306067.pdfIn PDF document text
    • https://site-1039929.mozfiles.com/files/1039929/xomosedigukif.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/ziluvuvekamigojuzakosa.pdfIn PDF document text
    • https://site-1040280.mozfiles.com/files/1040280/5249874731.pdfIn PDF document text
    • https://site-1038961.mozfiles.com/files/1038961/bebukelopelebij.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/rosom.pdfIn PDF document text
    • https://site-1038510.mozfiles.com/files/1038510/rivat.pdfIn PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/83127969694.pdfIn PDF document text
    • https://site-1039607.mozfiles.com/files/1039607/33515436053.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/94ee966f-e57e-425d-a076-4d521caecb06/perowiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba7c38fa-baca-43a8-b26e-e2096cb302c9/30473142118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d8989ac-d606-4114-ac83-6d350c6173ea/54432025204.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5490 5004 bytes
SHA-256: 2b005a606f6595a913cc7ac2304e1256b5cefdd12b7a3ba9c5a967bacd423391
font_01_sfnt_off0000659a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659A 1612 bytes
SHA-256: c3294601052d62b3aa48d671a148b76fc921205f1ad2d4e6ba967bd5cf136d08
font_02_sfnt_off00006db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB2 10032 bytes
SHA-256: ac6ed74c9d95bb04ae573e9ebc856206ae7391321b7c052671f3e6848c43ba4b