Malicious PDF — malware analysis report

Static analysis result for SHA-256 685180481446b913…

MALICIOUS

PDF

46.2 KB Created: 2020-10-25 06:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0b8cd34883fa675e3d7d1c1e7c89d90f SHA-1: dffff1bd9f7cd385055c360004ffb36532ec3a9d SHA-256: 685180481446b913ba6f5f129ade8b71c83f5c730c3c3c80f22a315f41d44725
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.me/123?keyword=android+tablet+best+battery+life In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8f000511197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f8a7f4b57f4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f93d1d5db83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5f8ab1ab385d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f915bba77fea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f9357b5b76a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5f8eacf0741d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5f9041d522f65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f926527880a5.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/1/0477/6384/9372/files/natural_water_purification_methods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8119/6227/files/perspective_education_in_telugu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/nuclear_chemistry_test_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7439/0678/files/roundup_pro_concentrate_mixing_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0808/2599/files/modufe.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/20283550489.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/sepsis_diagnosis_and_management.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/zipakovel.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/85257647312.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/68125623859.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/vocabulary_in_use_upper_intermediate_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/zewuvimimef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6945/8582/files/introduction_to_business_management_exam_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7092/9090/files/algebra_worksheets_solving_for_x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7855/2218/files/autocad_elevation_drawing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3841/1422/files/21198330336.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_off00007262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7262 5132 bytes
SHA-256: 5bdc169efa45a0afd039437de6ed099c54dd27b9299939dd7eedb7412992e29f
font_01_sfnt_off000083ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EA 11548 bytes
SHA-256: da2d817ecaa037d08a72de87b5ded53a5689356782eb7092d0841630ea2e18d2