Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb456c7e87f74558…

MALICIOUS

PDF

71.9 KB Created: 2021-01-16 00:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 639db5d1ab7c7f7b921fc6ebd97559e1 SHA-1: 785ac7fa5b523f73773c561774d49f450991d9b6 SHA-256: bb456c7e87f7455857108f3898927413e8176f888fa73d729dca8404c4f8e8e5
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/123?utm_term=rick+warren+why+am+i+here'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

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/123?utm_term=rick+warren+why+am+i+here In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5fd91a4b7bd73.pdfIn PDF document text
    • https://site-1177746.mozfiles.com/files/1177746/bubble_guppies_fish_tank_decorations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477630/normal_5fc0d24a909df.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/PjgiinD/15944096531.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/Zjgo3Eq/cold_war_beta_end_date_xbox.pdfIn PDF document text
    • https://site-1226269.mozfiles.com/files/1226269/flight_delay_air_traffic_control_restrictions.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/wogikokuzotaxa/32526519594.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/nesutedam.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/assignment_of_contract.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/87888618002.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/modib.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/12279694156.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/54603866677.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_off0000dbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFE 5096 bytes
SHA-256: 8bc471fb2c798bd7cae77f1e7fd6423b5a5f36f91a6d43de1e19e04f31872770
font_01_sfnt_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 11108 bytes
SHA-256: b74a192957f58c8624a27d32b34d7d8a4cc1ae97dca3d77f0b6ed4433a24891c

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