Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3d0227d2c70621…

MALICIOUS

PDF

46.5 KB Created: 2020-11-08 04:10:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1d5f1ea91052cd55140e9f9024f33723 SHA-1: b8e06ff90d6debd7feb503984906d9d38f4c50dd SHA-256: 6d3d0227d2c70621c426333a49ad18439cae22dc9f280e3aea15774261754ea6
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to link farms and one specifically to a known malicious redirector at 'traffine.ru'. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for a 'cheat engine table'. The ML classifier also strongly indicated maliciousness.

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://traffine.ru/123?keyword=battle+brothers+cheat+engine+table In PDF document text
    • https://zipemulobob.weebly.com/uploads/1/3/4/5/134528333/widurefu.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/sevilosivolaku.pdfIn PDF document text
    • https://wopuremob.weebly.com/uploads/1/3/2/6/132696580/riwaza.pdfIn PDF document text
    • https://sokegipamemaxo.weebly.com/uploads/1/3/4/3/134345901/lexitapufane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5f8efca3e2a48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dukexajuj/vovofafuduxotusa.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/mevexezirufon.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/carcinoma_basocelular_fisiopatologia.pdfIn PDF document text
    • https://lejoweneno.files.wordpress.com/2020/11/lelizimadosoboje.pdfIn PDF document text
    • https://dutokulodopo.files.wordpress.com/2020/11/unikey_4._0_rc2_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/hawthorn_park_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/fiduwebofaparel.pdfIn PDF document text
    • https://tobaluli.files.wordpress.com/2020/11/96407218332.pdfIn PDF document text
    • https://nalorirugu.files.wordpress.com/2020/11/facebook_blueprint_study_guide_2019_update.pdfIn PDF document text
    • https://togaxovite.files.wordpress.com/2020/11/fagejojumowowaros.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/repigubupogapilovubitovap.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6870 5040 bytes
SHA-256: f5936602a6583136e70938b38a86dd866d55960249138dc2d37e804e311cfba2
font_01_sfnt_off00007981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7981 10864 bytes
SHA-256: 4d863b678566343cb2487c76e03a53c2217065bad3c0d2f1f73b5a3347b7e8d7
font_02_sfnt_off00009e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E9B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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