Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a07e36342b8fedc…

MALICIOUS

PDF

59.6 KB Created: 2020-10-07 03:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a72c66652cc3570fe4853914d000f0a1 SHA-1: f4bde6c35df5703193079e4e0dd52048459fa18e SHA-256: 2a07e36342b8fedc7d5338263d2abeb0a16fec60c7aa19f98d0c2d10e12f80ae
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, including one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this file as malicious. The presence of embedded URLs and the overall structure indicate a malicious redirection or content distribution scheme.

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://gettraff.ru/strik?keyword=5e+grappler+guide In PDF document text
    • http://files.fiddlerofstrathspey.co.uk/uploads/1/3/0/7/130740000/gamujatub.pdfIn PDF document text
    • http://miwerosid.mail.byboukje.nl/uploads/1/3/0/7/130740265/0ce65f87678cc.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/63c3e31f-d8d0-4d8c-8e3c-27c260723772/53542272675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591b116f-673f-4561-81e9-5e62dd603c39/pizidikim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36f4d8e-b3ba-472b-89e7-f4f5896c8462/60303847156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1154712-ca5d-4736-ba8e-9f04a75f1266/8535497386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8468/4706/files/riximotazufabofidovinigig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5480/4377/files/sapojikugar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/vojunizabigofafijebuvekol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3971/7538/files/a_drastic_way_to_diet_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b6c771-3c72-4aee-8a70-1dd9e81680c4/48043487649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963e6f38-d324-4a63-81fc-59403febc614/67960613105.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_off0000ac2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2C 4980 bytes
SHA-256: 61106c9c3fce5c1622b29fe7e4f8f307caa30e3cfb7fc53c4dc6f435521270ca
font_01_sfnt_off0000bd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD26 10712 bytes
SHA-256: dbac084b9282cd6127c5d9f1b7c83c5b7c36448b09b16881d16d706a367b3706

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