Malicious PDF — malware analysis report

Static analysis result for SHA-256 8553abd675b7ff5f…

MALICIOUS

PDF

34.5 KB Created: 2020-11-01 15:24:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3d34fbc47ab4d2ce803f4c8210d0a1fb SHA-1: 86a5d5b1a28e59cdb38e852488d3b2e7bcc3298f SHA-256: 8553abd675b7ff5fef692737bc137dd255f13cdce7125c42d9bb760b9e7bef5f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, identified as a link farm, designed to redirect users to external websites. One of the primary redirector URLs is 'https://ttraff.link/123?keyword=amc+8+2009+answer+key', which is flagged as malicious. The document's structure and the nature of the links suggest an attempt to lure victims to potentially harmful content, likely for SEO manipulation or to distribute further malware.

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.link/123?keyword=amc+8+2009+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5f8fa857341d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f9413e5a627d.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/namozelimokegozimu.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/xujewonagamaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5f9b73e953fec.pdfIn PDF document text
    • https://kujuxase.weebly.com/uploads/1/3/4/5/134584075/gobonejujusujexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5f9567036cfce.pdfIn PDF document text
    • https://wabozejitikaz.weebly.com/uploads/1/3/4/4/134495441/wafuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450247/normal_5f9e90e8c8d93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446762/normal_5f9dfaa7cb0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f8ff933a411a.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/1/0431/7007/0687/files/ielts_writing_task_2_band_8.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/vopuruzodenomoketawas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8038/3171/files/descargar_libro_la_cuarta_dimension.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/seduwumaboninexisir.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_off000047dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47DC 5784 bytes
SHA-256: 7724c80193b468d0f5cb1d820a932779aabf64e469d64e48e383021a723cd1b8
font_01_sfnt_off00005b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B92 9776 bytes
SHA-256: 3a277ab2cb35940266d1e2fc0b91886a781e6074519135f3d4c0be0cadaafd46

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