Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ebcb4f46229c97…

MALICIOUS

PDF

41.3 KB Created: 2020-10-25 18:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c5f37ab19f39666302774300d8563e89 SHA-1: 9aa603c3c2e83a4114d4ee116f15b4e2ac713b4d SHA-256: 94ebcb4f46229c97c3e54c2f1b0d9537cc0dbef0a0f18ff376ca3a74b08e1850
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link. The embedded URL, https://ttraff.cc/123?keyword=imperial+armor+index+adeptus+astartes+pdf, is designed to lure users into clicking on it, likely leading to a malicious website or further compromise. The document body, though heavily obfuscated, contains this URL and other benign-looking URLs, suggesting a phishing or redirection attempt.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=imperial+armor+index+adeptus+astartes+pdf In PDF document text
    • https://xajapeni.weebly.com/uploads/1/3/4/3/134341300/xuzuwisajafedeku.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/biratamisovogi.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/4145620.pdfIn PDF document text
    • https://lirebuzufosol.weebly.com/uploads/1/3/1/4/131453665/8ba292b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_5f9367067e197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f8899639e6ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f898df4c2572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f8a8c6fd8887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f8dc3a87d4f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f8ca81fe9b9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8763e5406bb.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/bidurudilidujug/back_to_school_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/bitujetoporak.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/incentre_circumcentre_orthocentre_centroid.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/8754536899.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/12874931701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/zosusisixunome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1035/7913/files/83118237565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7877/0848/files/ontario_car_bill_of_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5978/1023/files/tamil_name_list_girl_baby.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8698/0268/files/6_strand_leather_braiding_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d180012c-e150-4718-a3b8-ea18f9a66a40/13894124177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe68c084-7797-4ff2-9bf4-d27cf2e59271/o_construtivismo_na_sala_de_aula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ce2755-f2c9-45ab-a6ef-82d039bb3562/76757261443.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_off000062e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E5 5192 bytes
SHA-256: 06edaf9863dbf06383adcf3db2f13c926cc17140f920493904b799e16ab28904
font_01_sfnt_off00007469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7469 10324 bytes
SHA-256: b564e3e42056464f00f1041c307dda267b99446a0ab5c931b3c5029aacccf3f9