Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d8b0b494eb1747…

MALICIOUS

PDF

38.0 KB Created: 2020-08-31 15:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adeda0ba20869a4a830cac45a4834b5a SHA-1: e1bae3cdfb91b8af6aac823c57b97e6db8598d63 SHA-256: 10d8b0b494eb1747bd79c9792c1131d6e76a3fb626273de28226639531bb58d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external PDF documents, a technique often used to inflate search engine rankings or to host malicious content. One of the embedded URLs, 'https://ttraff.com/wix?keyword=offline+bible+niv+free', is flagged as a known malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.com/wix?keyword=offline+bible+niv+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ledoviz.pdf
    • https://cdn.shopify.com/s/files/1/0436/2131/8818/files/63455111918.pdf
    • https://cdn.shopify.com/s/files/1/0431/8730/6658/files/norma_culta_e_variedades_lingusticas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4210/files/60917817607.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/difixerexawesazuzupedafi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0405/6984/files/fekimemadu.pdf
    • https://static.usrfiles.com/ugd/3b7182_b6ce71e6394048daaddfe7e7c178a1da.pdf
    • https://static.usrfiles.com/ugd/d01287_64f8a7254689466f965f31484b8f2c24.pdf
    • https://static.usrfiles.com/ugd/4dd980_87910f16430742a680c6a58df91f17e4.pdf
    • https://static.usrfiles.com/ugd/003b86_750cabae688846d89e47a5a7e3b448a5.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_off000057f5.bin
8b749686d3644628e9be930bab203b772af7359b9eec7ab745a52a177e55ebb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F5 4600 bytes
font_01_sfnt_off000067b5.bin
0e89a6a983e45755cdebca0f67abad32fa4958e0e37df8a3ff20f4a99e7167ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B5 10676 bytes

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