Malicious PDF — malware analysis report

Static analysis result for SHA-256 05feb93883f53ebd…

MALICIOUS

PDF

46.6 KB Created: 2020-08-07 22:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41ea80b2ec0fc7204c89c646896fb0de SHA-1: ebe25054442478f17f001c1ce7b9182db69f2db7 SHA-256: 05feb93883f53ebd88189eb9df649b777a44a942c33cc14ecc60edab3de2079c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to generate SEO traffic, with many links pointing to PDFs hosted on Shopify and other domains. One prominent link, 'https://ttraff.cc/pify?keyword=best+business+ideas+in+kenya+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to business ideas and the wkhtmltopdf tool, suggesting a lure to disguise the malicious link distribution. The ML classifier strongly flagged this PDF as malicious.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=best+business+ideas+in+kenya+pdf
    • http://files.envision-benefits.com/uploads/1/3/2/8/132815367/c9f167a8cf.pdf
    • http://pixati.topnotchdjservice.com/uploads/1/3/1/6/131607131/cc7176f.pdf
    • http://gogoxe.thesolarlesotho.com/uploads/1/3/1/6/131606407/4154826.pdf
    • http://files.christiesbeachbowls.com.au/uploads/1/3/2/6/132681772/9018038.pdf
    • http://jukus.jessejaymestattooco.com/uploads/1/3/2/8/132816066/kezubogomaxoleviliju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/woxusoraloxef.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/60758198313.pdf
    • https://cdn.shopify.com/s/files/1/0437/1588/7256/files/luxarilux.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/rename_github_branch.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9377/files/wevokaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9539/9325/files/validetisefukisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/tawizok.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/nopekurikiji.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2682/files/13239505242.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/buvotusisewelikobegofug.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/51027108163.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_off000077ed.bin
635a43f3c33ca786c3cc5c18a750013a29338767133c92ad9e82f528a8778dd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77ED 5264 bytes
font_01_sfnt_off000089f7.bin
bd5fbd0dac930b98d63c3f887a6fcceae68ffe9f3d7a32b5126a95e48b43a697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F7 10316 bytes

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