Malicious PDF — malware analysis report

Static analysis result for SHA-256 d632ac0b45cbcc33…

MALICIOUS

PDF

50.0 KB Created: 2020-10-27 19:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a1469d50c62572ec3010f554b9f4205f SHA-1: df2b2a1078bd4628b0f612c64b4b77ba4760439c SHA-256: d632ac0b45cbcc33bed87483fb6b83d46ae8fdb27d6cf63524d8015455352333
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://gettraff.ru/strik?keyword=benefits+of+nature+play+areas In PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/5a27bd4.pdfIn PDF document text
    • https://lezivefa.weebly.com/uploads/1/3/4/4/134458465/nemuletevamaxapu.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdfIn PDF document text
    • https://jalekusurasi.weebly.com/uploads/1/3/4/3/134392531/d415a9c0421c68.pdfIn PDF document text
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/zukunerojobel.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/10610.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/wibudolalamatix_fuxetokama_mopivulit.pdfIn PDF document text
    • https://noxurujoba.weebly.com/uploads/1/3/4/3/134384046/1b84b118674293.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/ac80dde7.pdfIn PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/suvelefiwupizik.pdfIn PDF document text
    • https://duxataravur.weebly.com/uploads/1/3/4/0/134017775/0a7d404.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/goxedipuz.pdfIn PDF document text
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/xiwivebowupa.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://s3.amazonaws.com/pusori/alimentao_saudavel.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/79558901416.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/72553115563.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/background_of_the_study_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/lutijut.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/75984770243.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/adsorption_kinetics.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/auckland_metro_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0069/2373/files/65549347029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4920/3885/files/number_patterns_grade_5_worksheets.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_off0000772f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772F 4928 bytes
SHA-256: 892e1abbbccf12e5ef44d9c7554280aee4944612c12ec56798ec2ee07c21e9ae
font_01_sfnt_off00008805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8805 10884 bytes
SHA-256: 47b57f0474916b780c73be73e3b93740dd13d935ef4e30c7518f6edf609c903d
font_02_sfnt_off0000ac2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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