Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2022a6257558ce…

MALICIOUS

PDF

45.2 KB Created: 2020-10-31 13:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4abc454f4d688677a2267779cb21d1a9 SHA-1: 871b76558ceb7eb857abde8ce92aadb47a2af4d3 SHA-256: 4a2022a6257558ce6ec27cac7b523863966ff2801cede9de72e6490228ea7c22
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, https://gettraff.ru/aws?keyword=betty+azar+basic+english+grammar+4th+edition+pdf, is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, suggesting it's the intended destination for the user.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/aws?keyword=betty+azar+basic+english+grammar+4th+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_5f936fb21c652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f875dd01d90c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f899fbf8f5cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412159/normal_5f9b0a0ba068b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5f9bc1e0992db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/ecocardiograma_valores_normales.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/grave_digger_power_wheels_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4338/7049/files/terovomiritepubimobodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5526/6978/files/naxuwuvedifujutosawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8222/8936/files/xidomefodizulikun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4961/9103/files/the_grief_recovery_handbook_in_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4022/6483/files/bissell_proheat_plus_pet_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1079/0826/files/karcher_carpet_extractor_with_heater.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_off0000601e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601E 5996 bytes
SHA-256: 1e09fad733e4842d792832b4682fdc0bb8652e0ce2f6f92c28b1aba7f189f71d
font_01_sfnt_off00007476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7476 16748 bytes
SHA-256: d2e52c8318ea9babf8dba04a3a6afd836cc927e8bccba647dcdfbd98494eb236