Malicious PDF — malware analysis report

Static analysis result for SHA-256 1beed5f60d2b0463…

MALICIOUS

PDF

43.6 KB Created: 2020-11-02 21:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50bf2db9cbc5add9a48f11193d6797e3 SHA-1: b9cd29ea49ac31cadc871cd70252b88e254974cd SHA-256: 1beed5f60d2b0463b39aa03399f638978ae917e6e00831122823f560535c5f97
114 Risk Score

Malware Insights

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

The PDF contains a lure for "Paypal money adder pc software" and embeds a URL that redirects to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URL indicate a phishing attempt to redirect users to a malicious site.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.cc/123?keyword=paypal+money+adder+pc+software
    • https://cdn-cms.f-static.net/uploads/4420600/normal_5f9adca95ebf9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jinabom/dapuravofudog.pdf
    • https://s3.amazonaws.com/bepukuba/batef.pdf
    • https://s3.amazonaws.com/wonoti/bitibepikuvovuzile.pdf
    • https://s3.amazonaws.com/nitirew/abnormal_psychology_textbook.pdf
    • https://s3.amazonaws.com/zirojopemup/21058224149.pdf
    • https://s3.amazonaws.com/lorifawuvawot/data_acquisition_for_sensor_systems.pdf
    • https://s3.amazonaws.com/fofeguj/bsc_math_book.pdf
    • https://s3.amazonaws.com/mitakajazum/tank_trouble_2_unblocked_online.pdf
    • https://s3.amazonaws.com/henghuili-files2/18182299830.pdf
    • https://s3.amazonaws.com/limewub/86608739173.pdf
    • https://uploads.strikinglycdn.com/files/2ced28cd-1899-4d43-be5b-a5bcba7cb13d/95762532118.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000688a.bin
7727fc693f87a085b5bc8f8b52602247c30f57cba53cc9b53b59b8a78a64b9d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688A 5496 bytes
font_01_sfnt_off00007b3d.bin
8503df9531792d56c84d18b5cabb55f9db19ca60ca1fb4a399f5843274664bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3D 11408 bytes

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