Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad68f9c0ae773c9b…

MALICIOUS

PDF

40.0 KB Created: 2020-11-02 00:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8d65356817ec9fea3a9375308628e4ad SHA-1: 94431717b8d9e5b910c9a72943353aa97488397d SHA-256: ad68f9c0ae773c9bab1c2c2c788880de94d15086bd2e4305288e1899ae03938b
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.me/123?keyword=virtual+lab+population+biology+answer+sheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_5f9c6d358218c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5f999a82a787d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_5f9e8adc09c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f9d4e6776ef8.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://s3.amazonaws.com/zirojopemup/apple_pencil_annotation.pdfIn PDF document text
    • https://s3.amazonaws.com/wixikarago/free_talk_and_text_apps_for_kindle_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/fomubupavisubovag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ea8fc6-1b05-41df-ae3c-b46c9995985e/60208559901.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/14993083029.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/attendance_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/19848860685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42668869-f476-4a80-b62e-4619752fd154/pomeranian_teddy_bear.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/takedozef.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_off00004f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3B 5260 bytes
SHA-256: 01039fe640be6d73a995990bea23a1417001e573b0253d6727645ce96b696d97
font_01_sfnt_off00006125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 10584 bytes
SHA-256: c613f1ae31ff7ea91ea754a9bb97d3f7ca9fafde04884cf372476ebc57ff2a81
font_02_sfnt_off00008513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8513 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2