Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64e6c95744a509f…

MALICIOUS

PDF

41.8 KB Created: 2020-09-10 21:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bfa96e14d52370810bac68e05e3d9a9e SHA-1: aafd357431d6fdce27245002ae9e5a70448b0913 SHA-256: d64e6c95744a509f561572e9d23ea04175bdbf80b0e50cebe2456d8f3565890a
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://ttraff.link/wix?keyword=cantos+del+camino+neocatecumenal+en+espa%25C3%25B1ol+pdf In PDF document text
    • http://files.courtneysaul.com/uploads/1/3/1/3/131379699/lubejiba.pdfIn PDF document text
    • http://liruteri.gainmobilitynorwich.com/uploads/1/3/2/6/132682076/kirit.pdfIn PDF document text
    • http://dirapine.deepscastle.com/uploads/1/3/1/3/131380729/vefowimowuw.pdfIn PDF document text
    • http://files.tinyhomes.10losttribes.com/uploads/1/3/1/6/131636655/e4df388b.pdfIn PDF document text
    • http://files.protectmusiceducation.org/uploads/1/3/1/0/131070934/xidedulim.pdfIn PDF document text
    • http://kejikone.karenperkinsauthor.com/uploads/1/3/1/4/131454065/tevidaxuked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/4f92c1_581d3aea85fd413b9cb0c9746f3546de.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/74a852_1baba9c8e47741d89e987d2bbc27ae36.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/031dda_075b8d1388294068a2925e7c4b072539.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/decf6f_7d9cd41c66f34974bcf7beb95e2ab51d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7ab50f_078adc2ff4c5402191c82365a295fca2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/13ae68_f1520c62395c42878aa21d83d8df9d6e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0047a4_2c37dd591c8d4459bda6e67447e64786.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_off00006198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6198 5324 bytes
SHA-256: a56d3063c6f89aa229cf1d4585a9c8479fa6f45f7fa41429c2aa19215b29af69
font_01_sfnt_off00007362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 11184 bytes
SHA-256: 55a26c91001e1faab05b80d9a86bd982bf0e676cf700e4bae493103194ab7593

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