Malicious PDF — malware analysis report

Static analysis result for SHA-256 d843d98a7840cfe3…

MALICIOUS

PDF

208.4 KB Created: 2020-10-30 08:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dc03afbdf9bd150be0e29fb06b14d24f SHA-1: 991d1c3155b083d559316b8af523f51672a21126 SHA-256: d843d98a7840cfe3212c7e92943ad8259e090d2dcc659cecbbc27ce4646c2ccc
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://gettraff.ru/aws?keyword=jay+chou+all+movies' is directly associated with this malicious activity. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URL strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gettraff.ru/aws?keyword=jay+chou+all+movies In PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/xiwawa_vesobovoze_diwokolavopeda_kunitodapawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5f8ee6162785c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f8883a87bd0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/64261324101.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/darez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/0678/4183/files/is_there_a_tj_maxx_in_bangor_maine.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/send_file_as_attachment_in_mail_php.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24a083f-6ef2-40c2-95c5-4c3eed1493b5/anycast_m4_plus_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/turn_cdr_file_into.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1488/7847/files/maduditifuteg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96d81fa-2ba1-494c-a0d3-8cd634cde849/ps1_bios_scph1001.bin_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97cb2da5-aa9c-40f8-8fee-c6c64cc9482d/ncert_9th_grade_math_book_solutions_chapter_13.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C33 132572 bytes
SHA-256: 78700e60b0cf8d3f54f963b66018c172faa0943dbb596e0d651775664b79869d
font_01_sfnt_off0002e05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E05A 5096 bytes
SHA-256: 17b84638b85a4528b7189dcd7dcaae24dcd8ac90eca916cee83177c08caf65d0
font_02_sfnt_off0002f19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F19A 14076 bytes
SHA-256: c2291f55f54999981769662ce42461214804dfdb46c4cfaae71dea7f60182d85
font_03_sfnt_off00031cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CF2 16208 bytes
SHA-256: fe147ee56d3b81b07f99b7e623fe54f9def5d836066ee85465f782d756fcb19c

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