Malicious PDF — malware analysis report

Static analysis result for SHA-256 64869f0ccc8524c2…

MALICIOUS

PDF

43.5 KB Created: 2020-10-01 10:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ed78273128d308f7caa3d6c4aacc1998 SHA-1: ecdff0cd4e33270862e87191678bb85fdb1e30c2 SHA-256: 64869f0ccc8524c285c0a1e1feaf1d402f61332576b4e3f11221448ac3972c17
152 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it links to known malicious redirector infrastructure and is part of a link farm on disposable hosting. The presence of a 'download button' lure and callback phishing indicators suggest a social engineering attempt to redirect the user to malicious content. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution attempt.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=small+pdf+reader+freeware In PDF document text
    • https://site-1039305.mozfiles.com/files/1039305/tuwomoz.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/82950730051.pdfIn PDF document text
    • https://site-1038375.mozfiles.com/files/1038375/zimodibopezup.pdfIn PDF document text
    • https://site-1038618.mozfiles.com/files/1038618/guribaximufojaba.pdfIn PDF document text
    • http://lififinix.maplelanepavilion.com/uploads/1/3/2/7/132741073/mixopanafakax.pdfIn PDF document text
    • https://site-1039179.mozfiles.com/files/1039179/mifabopiger.pdfIn PDF document text
    • https://site-1036873.mozfiles.com/files/1036873/disibawepedatadel.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/komil.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/runapefogag.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/joxerunojobukeruzuraxe.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/463b124d-6082-49bb-a41f-637a802af5ef/40676370887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b285a0fd-700c-4caa-8b92-e72ca05d7150/kusotufe.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_off00006cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB2 5204 bytes
SHA-256: ff2be8c1f2d7d1e7f093ffb2bc9726dae2757c885d8029366a18222ceea8261f
font_01_sfnt_off00007e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E60 10296 bytes
SHA-256: c3a5fe67e2f0e1a2ad69bdb9003653e833a3cc5a71b7cfa174bcfa0181fa7692

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