Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f99045bc268a049…

MALICIOUS

PDF

45.5 KB Created: 2020-11-01 23:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9c369baaea7d9e857830dbb0fb86400e SHA-1: 2384ffc62e197f354888898541c5aae0a6d538e6 SHA-256: 1f99045bc268a0496ffa03d34ad75da75d605ddeca0832fd171ea73277e3db4a
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/123?keyword=verizon+lg+flip+phone+manual+lg-vn170 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_5f932bcb5e1aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412773/normal_5f93d9902f0cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5f99828f568c7.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://cdn.shopify.com/s/files/1/0501/9346/5522/files/defeat_in_detail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880a1fa8-2e7f-4c74-a829-dd43875633e1/fexukeziwuruviteg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/8838/8514/files/fellenius_neutral_plane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7136/5819/files/faraway_linear_models_with_r_2nd_ed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0509/1498/4096/files/28440230563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfddbc5e-3671-43b8-9605-f7cd99ed2513/sizanigirorados.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5615/0690/files/xovigux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/resize_less_than_500kb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7527/2855/files/damals_war_es_friedrich_chapter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/22334955476.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/rixizapefuzik.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_off00006473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6473 5320 bytes
SHA-256: b383688785f0ae62158c1119e1874ba4c9cde9a62d749a3f580917ac285f8d50
font_01_sfnt_off0000767f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 10660 bytes
SHA-256: 8dc529421ce2a864fd1ed5613f188b0adad6c601ed911e1f1f2d4465a7d669fa
font_02_sfnt_off00009abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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