Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f2d9958f3c047f…

MALICIOUS

PDF

49.6 KB Created: 2020-08-06 19:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7992fa2e40dc52a8fbf4fbd258cab792 SHA-1: a80d0dda1d5999734a07355763819bc64bedbb40 SHA-256: 04f2d9958f3c047f7e3e76d93bbf91769cbb50d25fcbc0598eaa3a419e969029
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at 'ttraff.ru'. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to direct users to potentially harmful content. No scripts were extracted, but the overall structure and link analysis point to a phishing or redirection scheme.

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.ru/pify?keyword=corrugated+box+design+pdf
    • http://files.suppjects.com/uploads/1/3/1/8/131856917/fudojopagibisezo.pdf
    • http://files.kitchen-centre.co.uk/uploads/1/3/0/8/130814393/norute-boporo.pdf
    • http://files.riveroaksnorthcharleston.com/uploads/1/3/1/1/131163760/vasiwetif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0450/8889/9224/files/dr_collins_pcat_2015.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/tofivoture.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/pakubopozejizavitadel.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/81627342072.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/14229155761.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/wordpress_private_page.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/farmacos_antihipertensivos_mecanismo_de_accion.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/modumuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/bomutagoboruk.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/bibeln_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2270/files/43584693007.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076bd.bin
ca9cd574bd3315c6e9854ade5c65ed1ae40537347f1f9d50f81128e73c74a5d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BD 5292 bytes
font_01_sfnt_off000088c7.bin
e61a87db8bbf5513bf743fd641b75d7d77e4f51fca6b43232e11367bc65d3d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C7 10168 bytes
font_02_sfnt_off0000ab94.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB94 4324 bytes

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