Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fd48bc802f3d86…

MALICIOUS

PDF

59.9 KB Created: 2020-10-28 20:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc5c5c7a7f351f29fce052ed2d14f7c0 SHA-1: 510b41d7dc72b9bab544e04a70618e168566266a SHA-256: 09fd48bc802f3d86f1e736df47af0a4862be9ec4d0f6d1e3ef5c101a0b6e2897
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary goal is to redirect users to potentially harmful content.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.link/123?keyword=warrior+cats+into+the+wild+pdf
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/givedef_wegamobuwex_didedetirume.pdf
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f8ab0fbd51df.pdf
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5f9377be67c11.pdf
    • https://pefopurez.weebly.com/uploads/1/3/4/3/134375846/newetafopixikoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0496/1307/8681/files/reteronizidoza.pdf
    • https://cdn.shopify.com/s/files/1/0266/7882/1043/files/solving_quadratic_equations_by_grouping_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/1752c759-e3e7-4ef8-a6ae-b20fcaf8c293/27944081746.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4242/files/1-1000_number_chart.pdf
    • https://uploads.strikinglycdn.com/files/984acf3e-47ef-425b-9845-533369c5b08e/punuguvid.pdf
    • https://cdn.shopify.com/s/files/1/0500/3978/3584/files/casa_de_solana_parking.pdf
    • https://uploads.strikinglycdn.com/files/8eeabd49-ca8a-4a4c-88f8-7a5974b3a7e3/28074246102.pdf
    • https://uploads.strikinglycdn.com/files/744b4a8f-29d8-4668-9bfc-099e7b70a887/96033618460.pdf
    • https://uploads.strikinglycdn.com/files/fe4705cb-6449-4418-94fb-87d19c38de73/70442263023.pdf
    • https://cdn.shopify.com/s/files/1/0498/1702/6715/files/declarative_sentence_worksheet_5th_grade.pdf
    • https://uploads.strikinglycdn.com/files/06d31425-88f1-45de-8860-b604067b44f7/guvosijoj.pdf
    • https://uploads.strikinglycdn.com/files/862230ed-9234-452d-9be9-8352f9b00ec7/23828202304.pdf
    • https://cdn.shopify.com/s/files/1/0484/2451/7790/files/94025711429.pdf
    • https://uploads.strikinglycdn.com/files/ecd66797-06c9-4cf8-91ed-be4d0b8756c5/9567854046.pdf
    • https://uploads.strikinglycdn.com/files/247f9a20-faa9-48fb-944c-2cd1f2ea33c5/8th_step_inventory_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d21.bin
4b22d8863c2c76caa6db3fa8f32f9ec78c82d8ea465fee3d41c5cd674039ef34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D21 4340 bytes
font_01_sfnt_off00009c65.bin
725d64f8b7e71cb22c12b9ac61be004fcec79100d494f7d0a98a28eb8e590dfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C65 5136 bytes
font_02_sfnt_off0000ade4.bin
70b50d7596f251d76a093267b8bc059c88730c1894e284031d5c148c081f6552		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADE4 11064 bytes
font_03_sfnt_off0000d39c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD39C 4324 bytes

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