Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6cb62ebf750ab7…

MALICIOUS

PDF

47.6 KB Created: 2020-11-08 15:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f069160d8441bfaf2e26f0545436d0e SHA-1: 133a0791089dbc459fbfe6faf450f1d840990c22 SHA-256: 6c6cb62ebf750ab72400baadf91b74df8f55d0523ff2b5c3709456cf8db11031
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and Weebly-hosted PDFs, indicative of a link farm or SEO spam campaign. The primary URL, https://traffking.ru/123?keyword=achievement+unlocked+2+achievement+list, is presented in a context suggesting a lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to drive traffic to external sites, potentially for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?keyword=achievement+unlocked+2+achievement+list
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5f95ba95c3c77.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/roruj-fegedevovelere-zexomojikazi-rewubujelem.pdf
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/2088254.pdf
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/xilakawobalu_jowatatalig.pdf
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5f95d81ca3658.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tajimipojimo/wofezimanujek.pdf
    • https://s3.amazonaws.com/rorives/vipenuberisinexakeninuki.pdf
    • https://s3.amazonaws.com/fejenijovekozu/gracias_a_ti_en_ingles.pdf
    • https://s3.amazonaws.com/bivanud/tewosikeragerubovir.pdf
    • https://s3.amazonaws.com/zuxadol/mawaz.pdf
    • https://s3.amazonaws.com/sorogamat/the_homebrew_channel_wad.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_off00007818.bin
b969eb8a9546c71e40d40f6a24695f990edbb0faae27e18f40ffe2f1ae415ba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 5328 bytes
font_01_sfnt_off00008a18.bin
29b5949f01820f7ac5fcd946753c8d05714cbb6f046af7d0250c0791975a2064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A18 11392 bytes

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