Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3e4b9cceaef05b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-15 01:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 968e299fca29e4ce9481763c82c8306c SHA-1: 027fee83b151b416132194d8b8aeb052dda7f79c SHA-256: 6d3e4b9cceaef05bb4787e4a6a4b1c7b3b29568bdb5999b532fc4488046a0ec4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link disguised as a download for 'Avast latest version with crack free', which redirects to malicious infrastructure. This indicates a social engineering lure to trick users into downloading potentially malicious software or visiting harmful sites. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=avast+latest+version+with+crack+free
    • http://files.moveablefeats.com/uploads/1/3/0/7/130739806/tumulonuditigogofoma.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/80731868726.pdf
    • https://cdn.shopify.com/s/files/1/0431/5801/2068/files/source_filmmaker_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/95919109126.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/71484084829.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/8139182756.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/36433144585.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/40331832548.pdf
    • https://cdn.shopify.com/s/files/1/0436/6050/9337/files/xutugazodujowalobita.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/circular_buffer_c.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/falosifuwilipuzopado.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_off0000635f.bin
3acb10e904ae4e12025b156f9038f4906310ab32822a5e07c0d0811e0eb26e3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 5176 bytes
font_01_sfnt_off00007505.bin
724a9ded7bf3825691410a9c80261a77d2ad7c3c65294f304e7aba72fa082f0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7505 10104 bytes