Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9880e85d882012…

MALICIOUS

PDF

69.6 KB Created: 2020-12-17 15:35:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bb6d3407c8cceee19f5252526ea6f915 SHA-1: 06f795ae5afc94c40bce92f98c60b3634a53b5c6 SHA-256: 8f9880e85d882012dd096b32af590d39ad9ef24ed785a7c9f6bbe657114d7006
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=airtel+app++for+android'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lead the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/aws?utm_term=airtel+app++for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_5fa7f623e8f48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fd635ce40e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_5f9cde16b804e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_5fab013e1a81c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/principle_of_primacy_of_planning.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/newspaper_report_format_cbse_class_8.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/59136941055.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/41273635241.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cbc6bdb33045eedb2023/t/5fcee36801eaf4591e1b0e17/1607394154403/christmas_delivery_slots_2020_sainsburys.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/lake_county_notice_of_commencement.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/67209311124.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_off0000d5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C7 4848 bytes
SHA-256: f38cd309c1f46a4d19afccd3e5973d0ee9cf2efbb6b62b2accec8ea17862d0a0
font_01_sfnt_off0000e653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE653 10608 bytes
SHA-256: 30edf5142dceaaa9f0405730f9f74b70ce1425f61b133c36765ab2948c7d8588