Malicious PDF — malware analysis report

Static analysis result for SHA-256 67787ed6e40ee339…

MALICIOUS

PDF

43.4 KB Created: 2020-10-30 17:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a8b0cd055599b0b96d29e4853fccc573 SHA-1: d1ef9b000bd3f5359491c5e590b54d3b4a35cc6e SHA-256: 67787ed6e40ee339737b610e03f99402462425396d086cc3776f7a4b9fcc1285
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body itself contains a URL that appears to be part of the malicious redirection chain, suggesting the primary purpose is to lure the user to a compromised or malicious site.

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://ttraff.club/123?keyword=kinkajou+for+sale+cheap In PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/vojibiwemaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_5f8d167e3cba4.pdfIn PDF document text
    • https://sitiguzesamow.weebly.com/uploads/1/3/4/4/134401829/nevid_sazafomafowe.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/123840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f9acf3f70005.pdfIn PDF document text
    • https://tupipukevoluda.weebly.com/uploads/1/3/4/0/134041298/50c17bbd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f894b42b2b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5f99491100770.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/dovulavavo/runoxibufugagugufameguzav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4363/4375/files/neverwinter_omu_hunt_trophies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7808/3246/files/figopatidamaguwezabibawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/cluster_sampling_procedure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4099/6519/files/44614725707.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_off00006b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B51 5212 bytes
SHA-256: 7508c44fa8e1d375d108b6245f6cd77629e00c887464ed289aedefb3c5310eed
font_01_sfnt_off00007d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D13 10588 bytes
SHA-256: 0b12511471d91f3353b1691da5cdcc3fa334d08d071e77b40808e1e2de188cf8

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