Malicious PDF — malware analysis report

Static analysis result for SHA-256 174728f578cea1f5…

MALICIOUS

PDF

53.2 KB Created: 2020-10-29 22:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 07b5770dacb052f516ee3009bed3c2a6 SHA-1: 99d028494d0439bcafb6d1c930b8484cc6a65ae1 SHA-256: 174728f578cea1f55f088ab6139a31abc0d3d67f0931c1cfd74ba16658cbe092
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though partially corrupted, includes the URL that triggered the malicious redirector heuristic. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt, further indicating 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://cctraff.ru/aws?keyword=pur+18+cup+dispenser+leaking In PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/vesedexomokapo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89f3482-a603-49ac-9a84-9b5c4f9942a5/75417623096.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/geometric_shapes_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2386/7288/files/cognex_dataman_260_quick_reference_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8114/5762/files/applications_of_stack_in_data_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7568/5537/files/66260461287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5105/6804/files/jutelomesivixatabimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d5f848-a791-4bce-bf90-276333f0803d/rare_british_old_coins_price_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/61150816689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0152/3620/files/womebonisevitirijasuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/lixololugemoj.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_off00009242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9242 5552 bytes
SHA-256: ded971f6b0e3b4c961ef5744c970b310c009e3cc0384947d07bbbce11f0b461b
font_01_sfnt_off0000a53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA53D 10436 bytes
SHA-256: 00ecb869919899623da15c4caaaa2d9841f46e4e3b337ce052cf11b855f8b347

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