Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4b076485a54eba…

MALICIOUS

PDF

16.6 KB Created: 2020-10-31 19:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2bbe47aff66d9f86cadf7bd9c343ad7 SHA-1: f52bb30c67df0522b55dac1982161a671586f1af SHA-256: be4b076485a54eba16f41324766b74699358fb8f27e4cdea380aedbe4e7bb2c5
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as a malicious redirector link, likely intended as a phishing lure. It contains a link to 'gettraff.ru', which is flagged as malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary target for user interaction. The PDF's structure and small size, combined with the presence of numerous external links, indicate it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 16 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://gettraff.ru/strik?keyword=eecs+degree+worksheet
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f99c7b85be54.pdf
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/kupoxenegavo_rowefipimesoge.pdf
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/loxodatike.pdf
    • https://cdn.shopify.com/s/files/1/0266/7829/6746/files/homonyms_worksheets_for_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0268/7159/5191/files/mabovixutemotoxukirorep.pdf
    • https://cdn.shopify.com/s/files/1/0507/0585/8729/files/essentials_of_human_resource_management_by_subba_rao.pdf
    • https://cdn.shopify.com/s/files/1/0498/5877/3154/files/pisexipobuluxanipajaf.pdf
    • https://cdn.shopify.com/s/files/1/0503/6923/3094/files/dd_national_live_tv_apk_download.pdf
    • https://cdn.shopify.com/s/files/1/0266/8104/9269/files/android_studio_api_version_in_editor.pdf
    • https://cdn.shopify.com/s/files/1/0502/7063/4133/files/moxemek.pdf
    • https://cdn.shopify.com/s/files/1/0503/3944/6969/files/envelope_postage_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0505/1357/6132/files/vasepuvusutelijugepikon.pdf
    • https://cdn.shopify.com/s/files/1/0437/5265/2951/files/museum_display_cases_nz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/lego_dimensions_ghostbusters_level_pack_building_instructions.pdf

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