Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfebc4af7cf68764…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 02:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c85552345af2f6ad102e313d2843a7b7 SHA-1: 25973090e9e65e56c7553cd3668bf7b9e77a0833 SHA-256: bfebc4af7cf687644517398806a3d497a61f5c10a14a1cbcff50404ff14affe5
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, ttraff.com, which is highly indicative of a phishing or malware delivery attempt. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded link suggest it's designed to lure users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.com/pify?keyword=imanager+u2000+user+guide+pdf In PDF document text
    • http://files.familylawyerminnesota.com/uploads/1/3/1/6/131607712/jubigi_vomikewupinoz.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/1/0431/5702/9024/files/dell_r730xd_spec_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/kirigogefuliwezolexin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32343356061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3589/7505/files/bangla_natok_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/80323265034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/73900139963.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_off00006fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA0 5540 bytes
SHA-256: 851abbde47768da70311b4e945640624df5793c834b32c7c5a8c468cf5a078df
font_01_sfnt_off00008258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8258 11180 bytes
SHA-256: 6bb7df81246a62e29b8c2346fc045dd61c564a20b1b7b7adaa7820071e438f31

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