Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e791759339a3aac…

MALICIOUS

PDF

34.2 KB Created: 2020-10-05 22:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6f1346acdfbd539ba6f298044fb3a738 SHA-1: 3ad2fcb1105416e9630c29c6456fd9b1a8d2ea7b SHA-256: 2e791759339a3aac556ae1dee197007be0becc16cb78fa29fbb33323cb5447dd
122 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to link farms hosted on disposable domains, ultimately redirecting to malicious infrastructure. The heuristic firings indicate the PDF is a known malicious redirector and part of a link farm designed to obscure malicious destinations. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=principles+of+product+development+flow+pdf In PDF document text
    • http://mefozaneb.litturi-photography.com/uploads/1/3/2/7/132710567/rijusiwub.pdfIn PDF document text
    • http://rofuxagis.eatbugsevents.com/uploads/1/3/0/7/130775198/retagojades.pdfIn PDF document text
    • http://files.craftyfoxx.com/uploads/1/3/1/4/131483685/6a2874f.pdfIn PDF document text
    • http://files.roxannaalbayati.com/uploads/1/3/1/3/131398279/porenatuwetojuni.pdfIn PDF document text
    • https://site-1039405.mozfiles.com/files/1039405/melabokuwijixabut.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/xepavafowonorifajatuxuxi.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/37282445277.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/goturejumolorudiju.pdfIn PDF document text
    • https://site-1039779.mozfiles.com/files/1039779/93837160400.pdfIn PDF document text
    • https://site-1039602.mozfiles.com/files/1039602/79071716812.pdfIn PDF document text
    • https://site-1039847.mozfiles.com/files/1039847/19113560609.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/e0e6226f-eeb4-4f9b-b68c-751d7e32155a/juzixekakubagemitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53bfa68b-51c3-4f9a-83f4-e1f1b1c17739/koritogegifunofatisij.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_off00006d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D58 5244 bytes
SHA-256: bda71ec569e2b1bd1fdbb8a435b197aaabb449e42d233b1c67c5608f72345ccf

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