Malicious PDF — malware analysis report

Static analysis result for SHA-256 9437cca1d4be55e0…

MALICIOUS

PDF

41.0 KB Created: 2020-10-29 14:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2805e74444d57b879d51a87339a841dd SHA-1: bcea81a62a4921d460c24c8ae707b311baa5e191 SHA-256: 9437cca1d4be55e021e06a9114209120d3791b5033942abc02d8268f6d6feda7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a 'Badger 100 manual'. The document body and embedded URLs suggest a lure to external content, likely for phishing or malware distribution. The ML classifier strongly indicates malicious intent.

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://gettraff.ru/aws?keyword=badger+100+manual In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/487102267.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/6621463861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6202/4123/files/ivo_andric_prokleta_avlija.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/blogspot_de_libros_para_descargar_en_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4570/1800/files/wenalexosiduzejiximapul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6153/5132/files/lekixofoxemojomosepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2412/1495/files/continuous_casting_refractories.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/certificate_of_incorporation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7469/6856/files/whatsapp_free_download_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/4915973731.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/gagixote.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/31009527904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4105/4105/files/welupezutevebubawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0842/5639/files/wezefilavuvekik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8887/8012/files/66378026927.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_off00006464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6464 5212 bytes
SHA-256: 41ad2d7b0bfe57d876f635ac7871d8e7f2f5b16f729ae93390765d9e9b89f19b
font_01_sfnt_off0000760a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760A 9840 bytes
SHA-256: ee0e2e8988228d9c30541a4cd384108627c37a46fc03d0139d9114464b8b7716

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