Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e5548463ccd16e…

MALICIOUS

PDF

59.1 KB Created: 2020-11-17 12:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2f5edebbb292fa469cf52cdbc41bcc SHA-1: 18665ed0b9251477231f1e7c0e1e1976ac38f4e7 SHA-256: 79e5548463ccd16e901222858f367dc7c37d7228421737cb7f234cd61a10d86d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://gettraff.ru/123?utm_term=mr+putter+and+tabby+pour+the+tea+reading+level' is the primary indicator of this malicious activity. While no scripts were extracted, the PDF structure and the malicious link strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=mr+putter+and+tabby+pour+the+tea+reading+level
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5fac184fda714.pdf
    • https://cdn-cms.f-static.net/uploads/4421476/normal_5fa89fda92543.pdf
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5f953bea9d654.pdf
    • https://cdn-cms.f-static.net/uploads/4413713/normal_5faebddcd19e8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kakef/95718234906.pdf
    • https://uploads.strikinglycdn.com/files/8e38c137-750b-435e-85a6-76b01c030769/dujomitilodabibezasawub.pdf
    • https://s3.amazonaws.com/dotivaf/reladesuraxo.pdf
    • https://s3.amazonaws.com/wenobagupexekap/38282762385.pdf
    • https://s3.amazonaws.com/sugaguxagu/adenitis_inguinal.pdf
    • https://s3.amazonaws.com/wejalixex/naschools.net_home_page.pdf
    • https://s3.amazonaws.com/tobobowu/landmark_realty_port_angeles_washington.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000acb0.bin
b0142cc6b80fc16d6f42ed8436ec4c6a3c485ca3264e7e70de505e8522402ffa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACB0 5352 bytes
font_01_sfnt_off0000beec.bin
d2984ebd03f321b770d1bf15bdeeec7dcb40524fd281c89ba42e92bb6a1172c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEC 9616 bytes

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