Malicious PDF — malware analysis report

Static analysis result for SHA-256 73beed352456caa1…

MALICIOUS

PDF

61.8 KB Created: 2020-10-30 23:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b7bb944fe245bbc1ee31451100d2c602 SHA-1: a4fa7c3b9628bf625acb467ade3eece216b93454 SHA-256: 73beed352456caa151c304e06af1419042efb8e7c0168ad9533e9e0115f51c5f
102 Risk Score

Malware Insights

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

The PDF contains text suggesting it is an audit checklist, but it also embeds a link to a known malicious redirector. This indicates a phishing attempt designed to lead the user to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the embedded URL is a primary indicator of compromise.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?keyword=lease+file+audit+checklist In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8817b34130d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4453/4429/files/branches_of_science_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/characteristic_function_of_normal_distribution.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/grandma_s_1001_uses_for_baking_soda_and_vinegar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4794/3843/files/26706189093.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/39504914068.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/walmart_alamogordo_zip_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8091/1515/files/euro_truck_driver_2020_apk_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2090/9207/files/whack_your_boss_apk_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0dcd70f-f943-4783-8b3a-d082d9fc611b/11422618889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8661/9833/files/mirafupasuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be830db-ede9-415f-8d65-9cf2dae1ea17/53186862281.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/rogikugexosewuwufixu.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/zujumiwizevonewexu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/26982733533.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_off0000b2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FE 5020 bytes
SHA-256: 50603d9b67ddd552e5ed688d9fd8adac45534931832393669c2c4baf4b34acd1
font_01_sfnt_off0000c413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC413 11172 bytes
SHA-256: a0da2dde381153f619b857f96d1722fe1ac3e39e901a6dfb1aae1335077043c8

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