Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42aa6fb1a01b205…

MALICIOUS

PDF

70.0 KB Created: 2020-11-17 23:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 26ba7abe331013248e188095e8fbd128 SHA-1: dc3cd1a609ed220120fcbeeed7022166928213e5 SHA-256: e42aa6fb1a01b2059ce865dcad095f7ec9f6be2ba8136acc6b1570ace0679dcd
102 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to a 'Bigger pockets ultimate beginners guide'. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=bigger+pockets+ultimate+beginners+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412379/normal_5fac3a1d06bec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3fb95a88-a88b-4a42-ace2-b8cb899f1835/binigimetupizibaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/29250027527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f99176a-2b1c-4b1e-b11d-840de0a6388e/jipijogezuredojatuwaruw.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/tokufudevomobode.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/zupetewukukef.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/download_adobe_reader_for_windows_10_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/26205872608.pdfIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/30935220950.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/soratizebuzixiposavobibad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC511 5528 bytes
SHA-256: 2227cdc4a55f02f2c904f149065bada3c1759c87fd75d1e5d65e182074738dce
font_01_sfnt_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 10940 bytes
SHA-256: 25aa4de92f31184a2d9d24dc456fee0468ea4bd0adc045ba9f79ff34853589f5
font_02_sfnt_off0000fd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD31 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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