Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9ea5e6e768494f…

MALICIOUS

PDF

47.6 KB Created: 2020-08-04 04:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d06706eb02e0cf3c9d3fe1fb37275d15 SHA-1: a0b002049651f19c681e7e7318d0a40fa37a3c5b SHA-256: 6e9ea5e6e768494f7c3baddb73c4e75ee34dcc0a64d1327bdb72ed8e54655a09
154 Risk Score

Malware Insights

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

The PDF document contains numerous links to external PDFs, masquerading as financial statements to entice users. One of these links, https://ttraff.cc/pify?keyword=sample+balance+sheet+and+income+statement+of+a+company+pdf, is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure and embedded links suggest it is part of a link farm designed to distribute malware or lead users to phishing 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 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.
  • 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.cc/pify?keyword=sample+balance+sheet+and+income+statement+of+a+company+pdf
    • http://files.zoepantinjewelry.com/uploads/1/3/1/8/131856917/tejazosexopug-zegelodomusa.pdf
    • http://files.kaileewallis.com/uploads/1/3/1/3/131398487/xojiludotebek.pdf
    • http://files.ryankarr.com/uploads/1/3/0/7/130739996/mologaso.pdf
    • http://files.maiawellnessstudio.com/uploads/1/3/1/3/131379860/d3bf0c640aac93.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/46963528990.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/levezosonesevodulanapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/kosefubenofukejajelemozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1993/5655/files/rujofonunixo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/89860916685.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/36513510022.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/blaine_county_sheriff_s_office_lspdfr.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/defuwebuwukegewudo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/83261907935.pdf
    • https://cdn.shopify.com/s/files/1/0429/5059/0627/files/tenubivev.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/wibewopujusimu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/binding_of_isaac_angel_room.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/28958621640.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a13.bin
da408943a2658c4df665691b59a64748a151ac15b6580d00cbc36d930ab4ca13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A13 5644 bytes
font_01_sfnt_off00008d24.bin
2a8dbe21dabda496da6c0c2581e9fa27239ca0f4ec7d541951908d6a5e299520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D24 10568 bytes

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