Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f6f189373c9c70…

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 10:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6904f26e176cd6259796e0f6a7909ef SHA-1: dc97c64b8799fc3a3adbd3941a77403367a11627 SHA-256: 59f6f189373c9c70279bebfce07b58fd001273685b4d73dc00d9970fdbb63f96
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'my hero academia' and the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or distribution mechanism. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

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.com/wix?keyword=my+hero+academia+season+1+episode+3
    • https://static.usrfiles.com/ugd/b8c837_40a2cbe2afd748799e551873f3087246.pdf
    • https://static.usrfiles.com/ugd/b8c837_72c5ec11d5c444f1aa132617d50e0fc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef5e09b7eced42b080408b2561c9aa22.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc7f93e8b811467cb0ed3ad494484435.pdf
    • https://cdn.shopify.com/s/files/1/0438/6432/6299/files/caruso_josh_groban.pdf
    • https://cdn.shopify.com/s/files/1/0440/2744/5413/files/infosphere_data_architect.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/active_passive_voice_rules_chart.pdf
    • https://static.usrfiles.com/ugd/b8c837_71f8c17080884841932376b293b9c202.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8583b214ffa40809a142a7795c9f486.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d6f1bd433a140919c808262f51d2089.pdf
    • https://static.usrfiles.com/ugd/b8c837_556607dc49464d3d904b3fb325880214.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c9f39ed0de14c4eb5c44c0f4445f9c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d19acdc6c0d443094c25e9c23efd574.pdf
    • https://static.usrfiles.com/ugd/b8c837_f63fa5da256941cfae0d6e715e33bf67.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f7374e4ddc74456af9432fd1a30e279.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5fbdb21f8294122bed343ea0e67c279.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c6c.bin
37fecc5e3104469835fb83878fb8aeba609e8bdfdbaeaf218a548590668600c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6C 4416 bytes
font_01_sfnt_off00005bf1.bin
2c4587a4b840d8fff8e2a03bc22cbe9b6403a7a01f420fbae2b8f65056175b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF1 5312 bytes
font_02_sfnt_off00006de0.bin
d0f950ba794e293d77faee1d6ad1cd864da4af96bc37fe79eb6049656d5f840c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE0 10192 bytes
font_03_sfnt_off0000909c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x909C 4324 bytes

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