Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b90ae2e50a3026…

MALICIOUS

PDF

56.5 KB Created: 2020-08-19 13:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65892f90e31061a6d315d9c552440e7d SHA-1: 34bd01c6c60b6838e96ee9e4f3c25cbdc22c9bc3 SHA-256: 06b90ae2e50a30261b099c7e73885b707c8e5845b68a4de5246c4ae3a51f5ed0
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.ru'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the final malicious destination.

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.
  • 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://ttraff.ru/pify?keyword=captivate+9+32+bit
    • http://files.herhairpalace.com/uploads/1/3/0/9/130969663/7269036.pdf
    • http://juveravuw.gsdhjaofficial.com/uploads/1/3/1/6/131606066/fba39de.pdf
    • http://files.reardenrealestate.com/uploads/1/3/1/3/131379894/riwimazidipix-dezavosuziw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/wolaguge.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/9994509110.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/mudibudenuxufojatato.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/97479342241.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/16893313456.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/sofifevufenesagagafowum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/fesabaxubejikugegovajira.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4008/files/concepto_de_biotico_y_abiotico.pdf
    • https://cdn.shopify.com/s/files/1/0450/6717/4040/files/medicinal_plants_in_tamil_language.pdf
    • https://cdn.shopify.com/s/files/1/0429/8516/0857/files/81649802520.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/salesforce_admin_certification_study_guide_2020.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008839.bin
1a9d11e9198f93349ca7fefa3e5123b7b17f8f3c464c5051031f2d68d94c85ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8839 5064 bytes
font_01_sfnt_off00009987.bin
2c5c0609a1f621ac1f348f4670c867c59548ef47ce8aee7b2760a7a69ad860ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9987 10776 bytes
font_02_sfnt_off0000be52.bin
4d0b7fceb6e0b8544dba10d314310d86ee7e0ac375a8e3b5fd915ca5fa71995c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE52 16448 bytes

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