Malicious PDF — malware analysis report

Static analysis result for SHA-256 973e0a199b917507…

MALICIOUS

PDF

45.1 KB Created: 2020-10-02 23:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bde5a510deeb38bf6416c1992cd2ffba SHA-1: 6f8efcc948303b765e1afe283ee9e394f375f388 SHA-256: 973e0a199b9175071e0bfb207fe2e872add7be008ad7461dacce02bead53a6b2
94 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/pify?keyword=how+to+write+a+chemistry+lab+report+introduction'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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.link/pify?keyword=how+to+write+a+chemistry+lab+report+introduction In PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/zevemifofajolupew.pdfIn PDF document text
    • http://files.foodparkcam.com/uploads/1/3/1/4/131453256/103cb26d5c.pdfIn PDF document text
    • http://juruwavul.hydroshockgrafix.com/uploads/1/3/2/8/132815732/zaxenaritigegafapoj.pdfIn PDF document text
    • http://files.crushblingboutique.com/uploads/1/3/1/6/131607010/sotuvisa.pdfIn PDF document text
    • http://files.clickcarton.com/uploads/1/3/1/4/131438130/6514562.pdfIn PDF document text
    • http://files.troop750.com/uploads/1/3/1/8/131871602/taxid_vulufekajanod_deveve.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/e838b945-8f3f-44b8-8d85-9e692a7afe71/tebujixubalituliduzosana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5faa16aa-2836-464e-ba03-ad0dc43d818e/punolikoranipagarulini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892eceef-15ac-4f6e-bd70-03579d78702e/joxovozamub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4932da96-0657-43a3-a3b6-a3e45684ec6b/vamiderotakavagodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d87e585f-7fd8-43f6-98e5-4b31b2686937/65516412107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54106146-ca29-4e6b-911e-c0709a478fa8/supufewanikesebin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b60c9a-421d-4853-923e-aa8b7a77864e/7241863401.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_off000070fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FA 5608 bytes
SHA-256: 1bfa60aa3342bbb85dadc4707f192d4b2c09fdc4a9cb8cf88152ba0aedd307d5
font_01_sfnt_off000083e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E8 10492 bytes
SHA-256: 0b8fa8d8b25a990342d7edbc8f53e74dd21e37dbe7ee10f13df226d9f993c470

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