Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e3f2637ffa584b…

MALICIOUS

PDF

43.6 KB Created: 2020-10-29 20:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c702e66810d5d99002159261de5691f3 SHA-1: df19f8afa5d1fbfcf9438d8ea655f848ea883042 SHA-256: 77e3f2637ffa584b0db09acca1bd4f806af509710565cf8e3cd2eb1f45ea9413
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.ru/123?keyword=adblock+plus+apk+2018+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_5f937d0430847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f8d0a97b4171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403822/normal_5f97d997dcf81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f97f9f6e3b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5f93ac4e92a86.pdfIn PDF document text
    • https://nunoperiv.weebly.com/uploads/1/3/1/8/131856708/besojiro.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/wexaboninikig_wurodirup.pdfIn PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/066748623c883.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/xamibudasagas/rb_gupta_automobile_engineering_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/gujovozisijopoxar.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/gomejotobixiwupokexomon.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/vidakasupojexunuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/jawuwuzudede.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F22 5776 bytes
SHA-256: a1676b33153f25e8a7c19558441d4748e2579cf943ba4adac48b79d42339a8b1
font_01_sfnt_off000062f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F2 13520 bytes
SHA-256: 4bbea4fc3e21ef87895bcc875bce8fe5763e46d5f8bf63692900957f5cf8016a
font_02_sfnt_off00008d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D27 16060 bytes
SHA-256: eb67323a3edc51f073cf7ae7c668a4400309481d93a41d1ca3bfc03d889966df