Malicious PDF — malware analysis report

Static analysis result for SHA-256 750ff94c752d678b…

MALICIOUS

PDF

50.2 KB Created: 2020-10-28 14:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 90fa30e3cf756f1d02b35bf225c9cfe5 SHA-1: e6e6a7cc8c745895ba1343bb247905b8ef503dbb SHA-256: 750ff94c752d678b19aeb56e96942cc577e5d94593fb4575aeed55262911acea
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to link farms and redirectors. The primary malicious link, 'https://ggtraff.ru/strik?keyword=palm+beach+county+school+calendar+2019-20', is designed to lure users into clicking it by appearing as a legitimate document. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection scheme.

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://ggtraff.ru/strik?keyword=palm+beach+county+school+calendar+2019-20 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f8acd6da8011.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/3314248.pdfIn PDF document text
    • https://wusaveverafojiz.weebly.com/uploads/1/3/4/3/134338410/xebosegifarotep.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/8597583.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/jotukema-fanabanug-zevababonugozu-tanaxibawenije.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/c2054caad718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8c48a656ae9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f8937f4e4eb6.pdfIn PDF document text
    • https://vujuzujotug.weebly.com/uploads/1/3/4/4/134478410/2815676.pdfIn PDF document text
    • https://bufibefoxoxopij.weebly.com/uploads/1/3/4/4/134489975/8ce1f.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/4041939.pdfIn PDF document text
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/d246051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f8e7d34a5f08.pdfIn PDF document text
    • https://finijuzado.weebly.com/uploads/1/3/4/4/134444754/1263163.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/pijupos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/9076/4463/files/fabegivamodig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6479/9644/files/94477833104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5262/1728/files/98932017545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3837/4553/files/calculus_1_file_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6214/7225/files/xudavote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9876/1125/files/pwi_homestead_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6088/7203/files/21958733454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8087/0809/files/vepelexaforaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/9610/8959/files/44482788700.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 5936 bytes
SHA-256: a0ebd7d0bd80621530839dc2283c80c178089eef107b361fba9f32ea445e0fd7
font_01_sfnt_off00009717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9717 10012 bytes
SHA-256: d05946f150a5784bb0a4524ca324942559dfe40de8ff4f6591d720c1c95e2e26

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