Malicious PDF — malware analysis report

Static analysis result for SHA-256 a070ebb63c6d8750…

MALICIOUS

PDF

37.2 KB Created: 2020-09-18 16:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b46a8bb473a2a627a8b25a50dc588a6 SHA-1: 8de01c3b48d0d83719171b000a573edccbf8d13a SHA-256: a070ebb63c6d87506479d6e3cd2794e5039a60c36bf76cac2dd9d8a0f8a173ad
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text referencing "toy defense unblocked games" and the malicious URL, suggesting a lure to a potentially harmful site. The presence of numerous PDF links further indicates a link farm or redirection strategy.

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.club/wix?keyword=toy+defense+unblocked+games
    • http://walusivok.spacetimeandquantum.com/uploads/1/3/2/8/132815014/6210335.pdf
    • http://dokal.rmaxclothing.com/uploads/1/3/0/7/130739349/7434028.pdf
    • http://lugib.crossroadsacousticfest.com/uploads/1/3/0/9/130969198/kipaw.pdf
    • http://wofim.celticdruidtemple.com/uploads/1/3/0/7/130739090/428431.pdf
    • http://files.klarastefano.com/uploads/1/3/0/9/130969837/sabufizelanozelikire.pdf
    • http://files.classicbirdhunts.com/uploads/1/3/1/8/131856205/wepugusafujajem-zitopumuten-xitibil.pdf
    • https://60286435-40ab-41cb-af0c-86bf8051cb59.filesusr.com/ugd/cbe325_e853b8b9f916434f8724e4829229c040.pdf?index=true
    • https://084eed7e-41d5-4e78-b84a-2a9e2194aae7.filesusr.com/ugd/a37a2e_9e21f7a2fb764abbbc98ffc53b2976dc.pdf?index=true
    • https://eeda0fa3-2714-4862-bafc-85d36e7f27b0.filesusr.com/ugd/aec2ea_d65e1ab52cab4fe8a61c01bdf4ef0542.pdf?index=true
    • https://85001097-c64a-4d39-ae2a-29d87051dee1.filesusr.com/ugd/fedf23_2a6dcf2722a145cbb861ab4b73fda9dc.pdf?index=true
    • https://649e2846-66cf-45aa-a6fd-7e74be58349f.filesusr.com/ugd/3c2e2e_8562d5c23f614f6896ef24fe5659b628.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0481/6083/3685/files/94584871999.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5317/files/halloween_worksheets_printable.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004792.bin
a1ec37f88363c386ed1ae606b0d1748f2841e6a3dbacfe3509e5bf92d3dc748b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4792 5256 bytes
font_01_sfnt_off0000596b.bin
81fcca2d66190eec39d6d01837b576dda297c5835953908f231a90258095e90f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x596B 9560 bytes
font_02_sfnt_off00007a03.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A03 4324 bytes

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