Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a0be90aa3bf113…

MALICIOUS

PDF

48.6 KB Created: 2020-10-04 22:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: eaf509d3edf545bdab43e650b421d98b SHA-1: e59c4ef19761598adabb236cd5deabdf162ec6c8 SHA-256: 90a0be90aa3bf1136064fa80eec03bf79dc6a5ce9890795b9a66ca8fc0c48db9
124 Risk Score

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://gettraff.ru/pify?keyword=product+and+process+design+principles+pdf In PDF document text
    • http://juwazi.harneycountyculture.org/uploads/1/3/1/4/131482975/pabivesi.pdfIn PDF document text
    • http://files.oldwakey.co.uk/uploads/1/3/2/6/132681602/ginirugikix.pdfIn PDF document text
    • https://site-1037875.mozfiles.com/files/1037875/44619628410.pdfIn PDF document text
    • https://site-1039437.mozfiles.com/files/1039437/70436441702.pdfIn PDF document text
    • https://site-1042992.mozfiles.com/files/1042992/29293892807.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/kuridivulufevateloralopob.pdfIn PDF document text
    • https://site-1036972.mozfiles.com/files/1036972/zanitubuvuwexivofuwapine.pdfIn PDF document text
    • https://site-1043494.mozfiles.com/files/1043494/janik.pdfIn PDF document text
    • https://site-1037260.mozfiles.com/files/1037260/fegikipakedatufe.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/97717226198.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/1/0482/4393/3336/files/how_to_scan_to_email_brother_mfc-l2710dw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1078/7992/files/supudeker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9641/6157/files/rukira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4513/7826/files/this_hurts_me_more_than_it_hurts_you_cartoon_analysis.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_off0000753c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x753C 5324 bytes
SHA-256: 91cdb1efc8cb46986430e6a6ced1857a8e838ef17e43d91812a5d72b07deaf9f
font_01_sfnt_off00008769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8769 14864 bytes
SHA-256: 6571a291dcfe69309788f79c41c0df488565bfad5050cc46ea50641309946a34