Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a76e8cdd2f087c…

MALICIOUS

PDF

39.8 KB Created: 2020-10-07 06:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 003ad48d6926c9af7b6c82b077120c10 SHA-1: 6b69240aa1c3b0e72720f3e2d3a706514c756aa4 SHA-256: 49a76e8cdd2f087c13a84f59701f1630bc59b4ade9a03482366329274ca2dc91
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The ML classifier also flagged this PDF with high confidence.

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.club/pify?keyword=parents+as+teachers+topeka+ks In 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/4cc96297-52a3-4eb7-a7c8-87e9eb13caef/difusegewufulilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e962c9-33e8-4a44-a713-76ebf2ecc147/77822168918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba4d40f5-3b23-404b-9318-ca1e55d513ac/kebikikeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfe9a09-7300-44af-a2d2-44f16adf6c5e/zugonigelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f31657-2048-4bf4-9cfd-c7fc54035dd7/94209717024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3cd3b0-e74d-43b4-9862-eeb6203b9ac7/lofozikamumud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78406d6-c725-4b52-894c-caae5ab244e4/doruvonelujoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab85e88e-fb8f-4bcb-a964-b6f28ef9a866/72636821868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed59baea-9ca4-4d07-a1c3-de218c3569fb/xelesolujotebutir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef61c74-2de2-4b9c-9a62-c1844dd8ddf3/lakaviniwoferezovedodulok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649a725a-fb76-488c-9cc4-b67169e1eda4/31426527341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3edf7f82-3b08-44c5-aa97-e09455e29871/87196371335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e76cd1-c33e-478e-ab52-f82c5527bef4/lapadasejukujum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a034f46d-62ea-4714-aeaf-fea82f1a5f67/72653965069.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_off00005dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBC 5052 bytes
SHA-256: 9700ffe744d22d2ba2efa942c156d6d36b756b725658a3cbaf0f2745d9767a6d
font_01_sfnt_off00006ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE5 10500 bytes
SHA-256: 0bf3baa3907a0af2d56b0639c1dd08144214fa1dfcebf7922d737abbc551f3f2

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