Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d408be8f37c8ff…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 05:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3a862f3938963ef6e9f4e4ca93f0c8a0 SHA-1: 8beabee4acfd233972a6b431a87ea3bd5fbc56a8 SHA-256: 12d408be8f37c8ff09d628b7ea774f48286be186e9a1b7ed3bdf9792a5d08ab5
154 Risk Score

Malware Insights

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

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://ttraff.com/pify?keyword=ncert+class+11+biology+full+book+download+pdf In PDF document text
    • http://files.hepto.org/uploads/1/3/0/7/130775980/4545976.pdfIn PDF document text
    • http://files.kabetogama-lake.com/uploads/1/3/1/4/131438471/c84b51.pdfIn PDF document text
    • http://sekuw.expansiontheoryproductions.com/uploads/1/3/0/8/130874359/tovupafoko-pitotegekezekuk-dokukexizin.pdfIn PDF document text
    • http://files.cardiologycarolina.com/uploads/1/3/1/3/131383283/2b1429a61e28489.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/1/0427/7246/3772/files/fenerbah_c3_a7e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8209/6541/files/74334559975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/96518859051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/coordination_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/faguda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/40772646319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/manufugame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/star_trek_beyond_putlocker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/bangla_books_download_link.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7421/6351/files/despacito_ukulele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/33063118688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0602/4090/files/25224056795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/37069547819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/examen_toefl_gratuit.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_off00006117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 5744 bytes
SHA-256: 97995f83edced83b16e4b0f92817ce5ce6a2191b0d3ae4cfb883511cb605d553
font_01_sfnt_off000074cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 9980 bytes
SHA-256: 7727ca0933fb10edbcb977890de9138ea6cfb7899feeb30a81ab0dd6b00a6b86

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