Malicious PDF — malware analysis report

Static analysis result for SHA-256 1018191e40b5bd6e…

MALICIOUS

PDF

114.1 KB Created: 2020-11-01 08:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6fb3854e73c0f4fd8dd6390053a61a9e SHA-1: 26ae31b86c920cb8923361e66f7a73aa3726411f SHA-256: 1018191e40b5bd6ea9ab40decc7cd8f020157534b9d7d6328e8749bc68230cfe
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector domains. The primary malicious link identified is 'https://gettraff.ru/123?keyword=fire+emblem+three+houses+supports+edelgard', which is flagged as a malicious redirector. The document's structure and content suggest it is designed to lure users into clicking these links, likely for SEO manipulation or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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?keyword=fire+emblem+three+houses+supports+edelgard In PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/kunoxuv.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/winas.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/larodajojurufup.pdfIn PDF document text
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/kijutugisiwewezobari.pdfIn PDF document text
    • https://setirinovaj.weebly.com/uploads/1/3/4/5/134528330/9963743.pdfIn PDF document text
    • https://rizadubarezesul.weebly.com/uploads/1/3/4/4/134499036/3677557.pdfIn PDF document text
    • https://puniduvete.weebly.com/uploads/1/3/4/3/134341297/1727988.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7863/7499/files/common_ion_effect_and_buffers_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0793e5-167c-45bc-b730-4384beab26d2/28937427720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d824e720-da02-4be7-8d68-cf312a742e04/happier_tal_ben_shahar_free_down.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8552/7743/files/papor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429f215f-823f-4aaa-880f-0930a488675d/esu_library_hours.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_off000183c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183C1 5468 bytes
SHA-256: 2bca747cdca245df9563c0fbd487fdf7a9c1078f6704aae94e2d98fac48573f7
font_01_sfnt_off0001961e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1961E 10764 bytes
SHA-256: 01e9fb3395106388ef061496f7294ed408cd6163e1e1c6e1320b4d99dea220c8

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