Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4daadd87fa904ab…

MALICIOUS

PDF

49.8 KB Created: 2020-10-31 05:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 528b47a031505b2b1131585c08e1ca79 SHA-1: 7fd4572edd5a54e6413e0b1c38bf73664ef9464b SHA-256: b4daadd87fa904abe9f028efcedf8b957d23064592abf038750f736d84bbf5b7
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?keyword=burn+boot+camp+kenosha+cost'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware download 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://ggtraff.ru/strik?keyword=burn+boot+camp+kenosha+cost In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_5f97fdd2e6c2f.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/kixovavapobevesujaxu.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/napotamoboviz_dimunekeluwo_bijesexasudowu_nosufel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0459/1737/2565/files/mathcounts_1988_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9304/2355/files/coyote_canyon_elementary_rancho_cucamonga_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/79441494214.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/miligujofojafilugisajanu.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/rabonadu.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/resufapaludito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2523/5612/files/zuvafizarivodire.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/fastenal_ram_trucks_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7462/4419/files/southern_italy_travel_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CF 5228 bytes
SHA-256: 3fa0361ad7d5cb4d3a63dbe9b61f5dd8e619a9c6e98b97c05c2b4fbd46c9404d
font_01_sfnt_off0000855f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855F 11568 bytes
SHA-256: b915958d3284d05e180bb4d1cbc4061df246f364c1d5fb429e46d65cb159ca25
font_02_sfnt_off0000abf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABF8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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