Malicious PDF — malware analysis report

Static analysis result for SHA-256 c864f8211989b5e7…

MALICIOUS

PDF

40.0 KB Created: 2020-09-17 13:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 339b613edb9312fd21d5381fa6d0c762 SHA-1: c65353e9a8c558970af96e5b4c42a1e86eeef1a0 SHA-256: c864f8211989b5e70131bf47a79624d0dac931adc149043f6d8c7ddd9ea9a1cd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the text 'La crosse technology radio controlled alarm clock manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting the malicious intent of redirecting users to potentially harmful sites.

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/wix?keyword=la+crosse+technology+radio+controlled+alarm+clock+manual
    • http://files.dorsethps.org.uk/uploads/1/3/0/7/130776555/b9667c8.pdf
    • http://files.dallasacap.com/uploads/1/3/0/9/130969580/a22c93968.pdf
    • http://sofosij.minneapoliselks44.org/uploads/1/3/1/4/131437254/dijejosamaw.pdf
    • http://files.aaronhathaway3d.com/uploads/1/3/1/6/131606563/40409.pdf
    • http://kabesokeb.mannaomano.com/uploads/1/3/2/6/132680856/7304965.pdf
    • https://aabd216b-668b-49de-92e5-4f968d705865.filesusr.com/ugd/f55bec_87f65d384edf4a759f9bfcacd92114f4.pdf?index=true
    • https://e28f044f-8594-4c3d-b497-da066c3a7382.filesusr.com/ugd/8e9e2f_395723642c6a44f3b6338bb00ad5a71d.pdf?index=true
    • https://099b90b2-467a-49bd-a764-0cf611556043.filesusr.com/ugd/58a813_29b08158a8f341f49e338b594473ed43.pdf?index=true
    • https://ae9b9d65-6b8b-4621-8b36-03d565b25d86.filesusr.com/ugd/de3d83_bca6d1ff07584bbb92ba9272c9f79919.pdf?index=true
    • https://0eaa97bf-c92e-4d6e-9252-cb46ba66e123.filesusr.com/ugd/0d089b_ed78c6e531104700901739d5a85f7a0d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/tratado_de_direito_penal_1_cesar_roberto_bitencourt.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0437/0713/8201/files/cambridge_key_for_schools.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/christian_wedding_ceremony_order_of_service_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/6524/3803/files/maderonavevolisoke.pdf
    • https://cdn.shopify.com/s/files/1/0481/6263/5925/files/gewugitakesota.pdf
    • https://cdn.shopify.com/s/files/1/0458/0799/2998/files/powivusebidifanikob.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005df3.bin
145063b1e4084de42d403ac6845ba21c68d69c1bb7fe89861204d8923eee343a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 5460 bytes
font_01_sfnt_off00007063.bin
00cb45e82a7b1b80989d865ed04958df348b3e5d11b65299d2246876bbd8e030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 9984 bytes

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