Malicious PDF — malware analysis report

Static analysis result for SHA-256 82784c4a096c1365…

MALICIOUS

PDF

45.6 KB Created: 2020-07-27 23:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9aadf787ebc606bac298bc3cdd703db SHA-1: bb3837b1ba15be74c84b5b3871b6eaf7236b28c3 SHA-256: 82784c4a096c13655c6da13b6e4c2704c1fe126853568f743297dff6549a0518
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL related to 'aadhar card by using name'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, many pointing to Shopify-hosted PDFs, suggesting a coordinated effort to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=aadhar+card+by+using+name
    • http://files.fourthunitedpresbyterian.org/uploads/1/3/1/4/131406036/5a62cffc5d.pdf
    • http://files.trescare.com/uploads/1/3/0/9/130970009/dosuxupubowatola.pdf
    • http://files.lifeempoweredcoaching.com/uploads/1/3/1/6/131607407/9541392.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/18039754409.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/takomigawepolilitafapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1013/files/numekexexed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/mulabigosawovemada.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/5132526759.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/32171644697.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/rujozosijamoseti.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/13126137639.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/rakosujuwisaxuritas.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/9073317493.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/77655054326.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/nukakatekutema.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/sogemubinazemutevo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1124/2144/files/35522965251.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_off000073fb.bin
7d98faaf9a6a8d250457902a7396ecdc625cf0cadca37725c024ced50f6b2e18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FB 5244 bytes
font_01_sfnt_off00008595.bin
4a439a9324ae9a92c467e4b6eb6183ca2d364d2ea702dc55dc6e35a8ef3e6c2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8595 10376 bytes

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