Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5bf535695fc295…

MALICIOUS

PDF

39.4 KB Created: 2020-11-03 04:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: af1b5491a81dec285f5ba07669fc83d7 SHA-1: bcc8a39002f1970aeacc4ff37b9c60c629b4b2c8 SHA-256: 6e5bf535695fc2955e93bb5189fb118d427de082bd5e4e97899f85a2eaad037a
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ggtraff.ru/123?keyword=read+surah+yasin'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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://ggtraff.ru/123?keyword=read+surah+yasin In PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/poxaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f9806dcd1694.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/dotepag.pdfIn PDF document text
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/defexetomobig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_5f97bf2ea3ccf.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/1d3d5152ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5f96740295a53.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/6760471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f932e1b1d57c.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/suxiweke/13811064518.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_off00005c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4D 4992 bytes
SHA-256: 7ef39378bf50d3fb9be2d31348726437f26dd87476564f079876d4fa364d4dc8
font_01_sfnt_off00006d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4A 10716 bytes
SHA-256: c7f5120303db3cc5424dddb6ff7af9694ca5351a5ecd469764c3ab2b3e438007

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