Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d07770ea08a8776…

MALICIOUS

PDF

84.9 KB Created: 2020-11-02 06:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ad29f568272238415bcc72a9a3c66414 SHA-1: 32ae727913d2440e85226fa21e7ed491034559c1 SHA-256: 3d07770ea08a87763b753489182b6b5467b7d3f4fd49fa71395fb9270a92fa43
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this file. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector finding, suggesting an attempt to direct the user to a harmful site.

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://ttraff.club/123?keyword=clyde+green+springs+school+board+of+education In PDF document text
    • https://sabitafev.weebly.com/uploads/1/3/4/3/134308069/39f8777816bb1ce.pdfIn PDF document text
    • https://jodalutuz.weebly.com/uploads/1/3/4/4/134444421/0301d8b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f98b24a67afe.pdfIn PDF document text
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/cbb0ca98c903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f8a8d9e5f1b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f8d5757b063e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f86f44fb4e30.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/5ae0a2fb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f9a9c51b84ce.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/695bbf852abce.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/pulijokitenomulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/gifuxegusudubodelofesenej.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/paul_mitchell_lavender_mint_overnight_moisture_therapy.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_off00010e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E41 5564 bytes
SHA-256: 0351b38209f42732c80586880206d56243f55a6853fcc8d2de817e9e3b5584ae
font_01_sfnt_off0001212c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212C 10980 bytes
SHA-256: 28f6214ba3be5558ddd8d9a8282f5120ef6cca433b61ae2e8581859dee81ab86

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