Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e58cf43b9dbe08…

MALICIOUS

PDF

75.4 KB Created: 2020-08-19 07:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8eec2193f10866ba7e7298e9ac07591d SHA-1: b253a45b8f26912f4a43d66266808cb2f9ee6c72 SHA-256: 01e58cf43b9dbe08b6f3ab77f472519a9b5207e9ab14200f2aba9a470920e996
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword related to celiac disease. This suggests a phishing or scam attempt to redirect users to malicious content.

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=celiac+disease+pdf+2017 In PDF document text
    • http://files.slowmovingpartssolutions.com/uploads/1/3/0/8/130873791/2142840.pdfIn PDF document text
    • http://muwadaso.taylormorrismusic.com/uploads/1/3/2/6/132682883/xedavunazometalipa.pdfIn PDF document text
    • http://files.sthelenaassociation-uk.org/uploads/1/3/0/7/130775025/nuwafinimajela-jovogos.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/1/0433/7877/0078/files/king_size_sheet_measurements_us.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/asrb_ldc_2020_notification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3891/4213/files/otoplasty_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9696/5269/files/kindergarten_math_common_core_standards_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/30220849166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/13469833740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/4616513219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/pegufeladuzumofeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/12878288366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0931/7787/files/altar_de_muertos_oaxaca.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA75 5364 bytes
SHA-256: 8006ffe9d6282dfba2a0691e652fe1ab78303b033fdf25436bb7a6e5ce24297d
font_01_sfnt_off0000dcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC8 14888 bytes
SHA-256: 0b005d55ca70b46573b0691fd7498d99e10c9ad8573ef51547e1241556b6e82f
font_02_sfnt_off00010b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B88 16112 bytes
SHA-256: 275d0ef8f619a30f75d5b67021c85ffe51dbf44d82a44ecb2d07128ff93f9399

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