Malicious PDF — malware analysis report

Static analysis result for SHA-256 25eeea49786b7a1b…

MALICIOUS

PDF

38.0 KB Created: 2020-10-08 12:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 029fa4fcc047ccb16c60cb9cf1ac8e91 SHA-1: 6b4ec8f63ae0e367ce4e3715da21442c683617df SHA-256: 25eeea49786b7a1bab2015c45c5f30a60c9398fa8c9d97e3f14a0b3c3b770763
124 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ggtraff.ru/strik?keyword=faisons+connaissance+worksheet+answers', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The ML classifier strongly indicated maliciousness, supporting the classification of this PDF as a malicious redirector.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=faisons+connaissance+worksheet+answers In PDF document text
    • https://site-1038999.mozfiles.com/files/1038999/4844759076.pdfIn PDF document text
    • https://site-1043438.mozfiles.com/files/1043438/74653136296.pdfIn PDF document text
    • http://files.sylvanbeachfestival.com/uploads/1/3/1/1/131163559/3706158.pdfIn PDF document text
    • http://files.roxannesmith.ca/uploads/1/3/1/1/131164479/8183759.pdfIn PDF document text
    • http://newid.artofsnowone.com/uploads/1/3/2/6/132681396/06ed5278eb7d35.pdfIn PDF document text
    • http://files.fineedgedesign.com/uploads/1/3/1/3/131379956/2622024.pdfIn PDF document text
    • http://zarixek.faithchapelberlin.com/uploads/1/3/1/4/131437462/bolekolomipod.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/1/0482/4059/1003/files/4x4_soccer_unblocked_weebly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6190/7108/files/thong_bikini_bottom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2876/files/metric_conversion_worksheet_with_answers_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4277/8519/files/73831323352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5cb3cf2-58f0-4205-99b7-201db605f770/41704897651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fd64a0-b33c-4aff-b2af-79e5f5d836dd/68457357022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a76c21-2f52-4d54-9ee0-0198b93e5a05/xubasumon.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_off000053d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D0 4964 bytes
SHA-256: 5c49525016959edfb1b3738fc8364405be58f01836536f2e182f6ec2533d3e32
font_01_sfnt_off000064c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C4 11824 bytes
SHA-256: 5f0e95491db353cf98c23d25a211b4d815756fa8925353e63c38102b8bf3fefe

Open this report in the interactive analyzer, or submit your own file for analysis.