Malicious PDF — malware analysis report

Static analysis result for SHA-256 6414f336dd1da7de…

MALICIOUS

PDF

46.4 KB Created: 2020-07-22 07:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4da34df78b0822bfbaeccd207152f1cd SHA-1: 2af2016027db73c0b17975c209db3d446979cf85 SHA-256: 6414f336dd1da7de3148224ed982afab57dfcf999ee9575cb9e6044447c16fdf
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.com/wb?keyword=horaire%20chevrier%2090%20pdf'. Additionally, it exhibits a PDF link farm with numerous external PDF links, many hosted on Shopify, suggesting a potential SEO manipulation or content distribution scheme. 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/wb?keyword=horaire%20chevrier%2090%20pdf
    • http://files.brigantinemedia.com/uploads/1/3/1/4/131483343/kewikuju.pdf
    • http://files.sgelitesoccer.com/uploads/1/3/0/7/130739525/3556aa1b1cd2.pdf
    • http://files.sandyburlesoneportfoliowfu.com/uploads/1/3/1/4/131455680/1769261.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/gutemabaxirovebuguxawevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/kokosulufaratak.pdf
    • https://cdn.shopify.com/s/files/1/0432/1578/2048/files/netujaxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/77040426578.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/58067186018.pdf
    • https://nuxujuw.files.wordpress.com/2020/07/zegaxodojewopegubawajilij.pdf
    • https://sixuxonudibi.files.wordpress.com/2020/06/58073182310.pdf
    • https://kagapub.files.wordpress.com/2020/06/91324983477.pdf
    • https://rovekozo.files.wordpress.com/2020/07/2411996946.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/degonexudisujuzen.pdf
    • https://cdn.shopify.com/s/files/1/0435/4595/2408/files/zobesikapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.pdf
    • https://cdn.shopify.com/s/files/1/0434/1419/2285/files/10455058452.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/60624272317.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/xaziwovupedugubujil.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9567/files/37083633197.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mipubafuminidumef.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/80607128406.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_off000076b7.bin
d35861d0409313c21a15595b0254db08a87d5e79b387e717e8c83c77adfb4ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B7 4956 bytes
font_01_sfnt_off000087a0.bin
aa7ba274353796cd0ce74d428c300942d90c69a3c1726d76033a1adc8fee4648		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A0 10836 bytes

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