Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34ed9b9acf5a292…

MALICIOUS

PDF

39.3 KB Created: 2020-08-27 12:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: be33b39c273425a156adcd638f40cc91 SHA-1: 7b12b4e69274898b2c5631326f0221b14d323fa0 SHA-256: d34ed9b9acf5a29232ed692627b166f3ea549690649250dbf5755c2bb194da3f
162 Risk Score

Malware Insights

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

This PDF file contains a malicious redirector link disguised as a download for 'chromecast for windows 10'. The document body and embedded URLs indicate a link farm strategy, likely to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to deceive users into clicking on harmful links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=download+chromecast+for+windows+10 In PDF document text
    • http://files.northcountyhumanresources.com/uploads/1/3/1/4/131438571/3038182.pdfIn PDF document text
    • http://lixefeb.teresasthriftytreasures.com/uploads/1/3/1/4/131405927/1105c50baab62.pdfIn PDF document text
    • http://volaz.natjacobs.co.uk/uploads/1/3/1/4/131437549/nubulasoxovavofovida.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/1/0429/4947/6518/files/21510310026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1263/5298/files/26113107163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/sivav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1800/9250/files/toxinomilelekujanorenil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2765/0970/files/6297943275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/zefoxodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6227/8809/files/excel_2010_vba_protect_sheet_with_password.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/essential_cell_biology_test_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/nozuwudakinolizobarave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/93420532452.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_off00005ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE5 5548 bytes
SHA-256: 582f809b8aa540cb063a064c975609ba5a7c5a0729d3e70476cb4c73d2140676
font_01_sfnt_off00006dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAC 10344 bytes
SHA-256: 6bc7b661c0ebffa4ec6051088b6adcf730542045c2f623803a625d5457451b0d

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