Malicious PDF — malware analysis report

Static analysis result for SHA-256 226cd624ca8279ac…

MALICIOUS

PDF

50.0 KB Created: 2020-10-17 01:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9c8eaf77338555fcbaac76c860209dd4 SHA-1: 9eb2617b2ab08986903833146912c309bd852a93 SHA-256: 226cd624ca8279ac74f08178b751b5544810cfd06cd69bd3838a3942fcc46c69
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The document body and heuristics indicate it impersonates a cloud service to trick users into clicking the malicious URL, which likely leads to a malware download. No scripts were extracted, but the PDF structure and embedded link strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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/123?keyword=download+spss+for+android+tablet In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/758a90.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/7017959.pdfIn PDF document text
    • https://jelamiwigu.weebly.com/uploads/1/3/1/3/131382248/tebasaxaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f8a218302d5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f875fa39307d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f8a15012184e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8907cd331fe.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/357da78a-332d-4a4c-8fb6-1f85ff51cffa/vifobupuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7f2608-6ff6-4840-862c-86a80c39c6fd/vadut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01066cc6-4f71-435f-ac16-3e6c4049a6af/58080342164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3985a22-60d1-4690-908b-4ef7e46344f4/47074604443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b1cb12-926d-45aa-8fba-37f2385e1b2d/kezunefeminaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1804/5600/files/isd_196_calendar_2017-18.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1070/6619/files/amazon_prime_video_tv_app_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5423/files/gopro_hero_7_silver_manual_dansk.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_off00008597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8597 5264 bytes
SHA-256: 77bbf4c5b0dd9f154d1a0b1949adddf7004f615cf97313c93836e725030ab94e
font_01_sfnt_off0000979c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x979C 10284 bytes
SHA-256: 42af005551c84a7b70950ad964392f4b61351fdaf59bebcf7b70a9e454a51e89

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