Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e871b0c690f834…

MALICIOUS

PDF

69.4 KB Created: 2020-12-24 02:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dab72ccb9f5a29002c34a05f1141c8b3 SHA-1: 9428c4e1224de8e319759a3ecdb289414d6074ae SHA-256: 13e871b0c690f83457ff94d10635963f4c1ad5ef256a4984b58bb00371e6cc52
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 0.9997

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://gettraff.ru/strik?utm_term=hair+color+changing+app+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4452609/normal_5fa8ecde3efbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_5f8e675e099cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5fe273f3d8253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_5fafd8bb270ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c4d3da-098e-42a1-90a9-f475db02888b/viveditumonovuwilogavul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5a3e68-d5b7-4249-ad39-3299b1601a92/gegesadisipomipetid.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/19241770166.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/19277331325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310ae4b2-6d1d-4d43-9d4f-b7f134a5d0cc/97276821084.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/cubefield_unblocked_unblocked_games_77.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/76281595561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f334921c-686d-40e2-835b-13f9712426cc/86426186955.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_off0000d317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD317 4976 bytes
SHA-256: edb444dc909bde8c7195c82cab784585d5b61f326498bc9b37ed9a2590fa3888
font_01_sfnt_off0000e3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FD 10896 bytes
SHA-256: 4088ff9bea6b4f179d30196004a1ad336eee6afecbbe8a3e4c14bccb16175b5d