Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e615e2377847887…

MALICIOUS

PDF

65.4 KB Created: 2020-11-23 20:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 93a5d2e470d9abcf977980bd36f41556 SHA-1: f1c80bed8613c3a68789d249606d7caabbd4f8ad SHA-256: 6e615e237784788774ef060cf466544909cdfd90c7bf99749b9c38882866d74f
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirect to known malicious infrastructure. The primary malicious URL identified is 'ggtraff.ru'. This behavior is indicative of a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=medical+microbiology+murray+9th+edition In PDF document text
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/mudiribivi_sapevofepesomor_joxubekeg_zojazobubax.pdfIn PDF document text
    • https://geregilewupune.weebly.com/uploads/1/3/4/8/134849809/f1f57dd4038eb8.pdfIn PDF document text
    • https://totapige.weebly.com/uploads/1/3/1/4/131483287/4445464.pdfIn PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/598b614.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/wegowoz_wujewaxepafid_xevizuxo.pdfIn PDF document text
    • https://dujodorenenap.weebly.com/uploads/1/3/4/4/134488447/dilujepawasawa.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/20630377-9fc1-45aa-a23e-f3a504fc2fec/67428858358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be000220-11b8-47d1-8f06-57f0a4ae4f33/flourish_and_blotts_inside.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fae73f4-8c58-4239-945a-7e0093c73ea4/5337623227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed14f75-0d5a-4206-9021-e925fb38b115/nadurivamuleworadifi.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/17068968031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3bb639f-dbf1-4b93-9e19-ba21ad3eae2a/59795819988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3adc53a9-ca77-409e-834d-082408bff15f/5181822063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad434aa-3ef3-4f37-ba21-dee278e01a93/aryeh_kaplan_meditation_and_kabbalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b292296b-e425-4d13-8011-a17360ae6dd4/fixum.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_off0000c4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FF 5576 bytes
SHA-256: 8e9dc38071416f407ed5fca4d96c03d10b00a008e880248dbd6db8e51fce5bf1
font_01_sfnt_off0000d7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D5 9816 bytes
SHA-256: e2d9e157b9a909bea14027f3b203d9c899dfd2ffbc392ee8cef50c0868971022

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