Malicious PDF — malware analysis report

Static analysis result for SHA-256 a450c62d72db3e62…

MALICIOUS

PDF

41.1 KB Created: 2020-10-28 21:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e80501f4de7e5fc43e8d167dc9b42537 SHA-1: 6edc4e8fdc2cfdcf4a62ac6d60fdcf3c39aef05f SHA-256: a450c62d72db3e62a926c14f8221825f7a2b97642e78ff48fbe109ceab458f80
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a known malicious redirector. The document body also contains a URL that leads to a malicious redirector, suggesting an attempt to direct users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=spectrum+remote+tv+codes+tcl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f872413302dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f901eb1b527c.pdfIn PDF document text
    • https://vokujesezi.weebly.com/uploads/1/3/4/3/134306830/2b039e178f3738c.pdfIn PDF document text
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/9042f3808da.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/1/0503/9819/9995/files/journal_of_environmental_protection_and_ecology_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/beliwexoxitipuledok.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/vemalufaginotaruriva.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/el_sur_jorge_luis_borges_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/5888627581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2663/9780/files/39744931125.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/paracetamol_mechanism_of_action.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7783/1329/files/61903659148.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/miconazole_powder_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/674604762.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/5862750166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/xigiroxi.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_off00006543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 5172 bytes
SHA-256: 811ae7e065d5e1038c0a301b1836c59bb96dde62ea6f921be49450b2517e0aba
font_01_sfnt_off000076cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CD 9536 bytes
SHA-256: dbf59ad5f49b87131eec86b374c3ee315d4ec827fabc78eff853cb6b44b557b8

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