Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dad23427673b35b…

MALICIOUS

PDF

32.2 KB Created: 2020-11-03 08:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 81f0a8253194400dbbaed591af652718 SHA-1: c30235d6da9e00bbe8d8e2ccd8bde49e7ba2a2b1 SHA-256: 1dad23427673b35bc0a6b73b63d8ac30b649a0c370803f9419090ce9ea2478c1
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself contains embedded URLs that are part of the malicious redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/strik?keyword=miles+city+high+school In PDF document text
    • https://sozipufejelaj.weebly.com/uploads/1/3/4/3/134352325/xuwajo.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/3339182.pdfIn PDF document text
    • https://kudumegowejo.weebly.com/uploads/1/3/4/2/134266354/riwetuzixov.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/parijo.pdfIn PDF document text
    • https://ravidaxixow.weebly.com/uploads/1/3/4/3/134315840/fopomojevafef.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/xinafe_wirowas_gevibadojut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ce7dac-bc02-4399-9677-60e1be0f8b8d/kutazesigufarulofopukojim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/3571/0380/files/precalculus_mathematics_for_calculus_6e_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/65085257452.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_off00004432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4432 4864 bytes
SHA-256: a921059b2c053ef75149f1e4a9f2ca183ae90c7a054fe95f9e71edc657feba2e
font_01_sfnt_off000054d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54D7 9460 bytes
SHA-256: 9790fb822c407d135644e9c439068931f70b5285af1cc3bb24f5e7473f70cbca

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