Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e7cfbd8fc60663…

MALICIOUS

PDF

43.9 KB Created: 2020-10-03 04:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ff10aeec587bfb30ccd5f5ce7b2d0b46 SHA-1: ed15ecf638ebb132665e3207cb98d16d878f3924 SHA-256: 89e7cfbd8fc60663771db66ef12cd8d4d0be1c8ff009bbef77ea97aea60fe85c
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a link farm, which is a common tactic for distributing malware or phishing content. The primary malicious URL identified is https://cctraff.ru/pify?keyword=articles+prepositions+and+conjunctions+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an intent to lure the user into clicking through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://cctraff.ru/pify?keyword=articles+prepositions+and+conjunctions+pdf In PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/kilajoxibovipamukipagofax.pdfIn PDF document text
    • https://site-1041676.mozfiles.com/files/1041676/77492938229.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/butolokisugapowux.pdfIn PDF document text
    • https://site-1037899.mozfiles.com/files/1037899/podewamafapoliduvutamir.pdfIn PDF document text
    • https://site-1039852.mozfiles.com/files/1039852/peverefogegubupaduzuwe.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/9346162174.pdfIn PDF document text
    • https://site-1038376.mozfiles.com/files/1038376/38704339724.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/dipigidapi.pdfIn PDF document text
    • https://site-1040399.mozfiles.com/files/1040399/10796756700.pdfIn PDF document text
    • http://jowuni.grovecreekfarm.org/uploads/1/3/1/4/131453384/bajusabesasob.pdfIn PDF document text
    • http://files.metersnelectronics.com/uploads/1/3/1/4/131438299/df2b6e4cd542.pdfIn PDF document text
    • http://files.theegote.net/uploads/1/3/1/6/131606631/fusul.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/529910c8-0eff-4340-99e5-2f3531a760df/18321599910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4301b3e-340e-46b8-b18d-7a90d8c2aa58/gerof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01efe4f2-2d71-465a-8ce4-cea8a01fd6ed/23306871016.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_off00006ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC 5212 bytes
SHA-256: dff20b707bd642e987dc00226685e1ff1757578161e47f48752cbfb1cc10f061
font_01_sfnt_off00007fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAE 10288 bytes
SHA-256: 53536898c64b35dfb96a8c4166dde95a56fcccb6b5530681617c98dd4e878706

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