Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b0bea5e8217f14…

MALICIOUS

PDF

43.0 KB Created: 2020-11-04 04:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0747d21136b7244e6cf9cb705548bfcc SHA-1: 7381adbcfde8b21820549d1bb56a1a44ab6bc269 SHA-256: c8b0bea5e8217f145f24d5815f5b4e7471e14e67f39428ca47eb84a50ec56f16
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?keyword=hd+online+apk+download'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the nature of the PDF suggest it's designed to lure users to a malicious site, likely for phishing or malware delivery.

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=hd+online+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f8b10df5a0f0.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/388efb16d8559cf.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/tusiwisotoloko_dizofipa_nuxer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_5f97b568077b4.pdfIn PDF document text
    • https://kozezivu.weebly.com/uploads/1/3/4/4/134444222/ridumix-muverifux-witopo.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/893689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ea3d905d-063b-4fb2-8849-610a234c042a/sigeworuxefixif.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/xomup.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/408-586-8481__-8659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da24db9-4c8a-476f-b5d6-40e385e0c259/51122354473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17aefced-af26-493b-aab9-1a6807aa052e/koluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d2d0cec-6ec8-46a1-b4f7-f160daa406cd/53094943349.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/1985_honda_fourtrax_trx250_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2B 4504 bytes
SHA-256: dcbbfa9d36051c88118e28a2f6e67283a1e54dcddc47ea106b6a31d3ff87529f
font_01_sfnt_off00006d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D89 10540 bytes
SHA-256: b2f1b1c1ff8c1a6da180206cfd899239ff32f23a2082f7ab88036d8cbe217c27
font_02_sfnt_off00009189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9189 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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