Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a9c4ccf319a155…

MALICIOUS

PDF

42.3 KB Created: 2020-10-10 15:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 3de0a118814edb46905848cb79dd0c21 SHA-1: ed48fa3d1f02de36e57594cb6af64805fde50929 SHA-256: 16a9c4ccf319a15564355ebd75b9373d5be7780c42471e63e1559c4b07cd63eb
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.club/pify?keyword=functions+of+web+server+scripting In PDF document text
    • https://site-1044209.mozfiles.com/files/1044209/tipenis.pdfIn PDF document text
    • https://site-1040360.mozfiles.com/files/1040360/buzuzukipabewejupigob.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/83842265302.pdfIn PDF document text
    • https://site-1038798.mozfiles.com/files/1038798/rizabumewoxovodo.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/23966427013.pdfIn PDF document text
    • http://nokug.majorpalooza.com/uploads/1/3/0/7/130738541/vuxilijifoxepu-bijiwapi-jabezim.pdfIn PDF document text
    • http://rujizijo.boisedetailing.com/uploads/1/3/0/7/130738943/7c72114c115c.pdfIn PDF document text
    • http://files.bingocompany.net/uploads/1/3/1/3/131379612/d2857f2095895b.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/f562ad8f-9998-40d9-91b5-ad04160c6269/77047452196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c721df2-7f8e-4ced-8750-b61ce427418c/47894939241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5000e1fe-3292-4115-b540-9a8d5f833dd6/zuvereladumakixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c007ae-60ca-441f-8ece-4197b49daf6b/4197885547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c83e3bb-79ca-4f28-8318-c8b19e14da97/surifodogalezib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/296ab598-370a-44cd-a11b-b641d479af3c/46945749779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02f29ec-08d4-486a-861d-1a400453f710/xunedixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e026585d-d551-4585-82ea-c77e9876e3c5/76458608819.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000687f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687F 5188 bytes
SHA-256: f80439acb6b5e4b8dc0534cd7a39f93bbfb5fb3472f030d9ae71dce960207ab3
font_01_sfnt_off00007a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4F 9980 bytes
SHA-256: a15ad22d28ee2b49f5dcc3ecdb80ebcd363ef7295ff4d52e730f9351195e355a

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