Malicious PDF — malware analysis report

Static analysis result for SHA-256 12890677a916ca55…

MALICIOUS

PDF

51.5 KB Created: 2020-08-28 21:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47baa36fa161bfd05c106aa42df90670 SHA-1: 84fdc9159ccf7efe22f8685f484fa1d4fbff55c6 SHA-256: 12890677a916ca556a8165a6aa4546377dc088916e6b0e4b0c31625388eba7f9
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL that appears to be part of a link farm, likely intended to distribute malware or lead users to phishing sites. The document body, though heavily obfuscated, contains text suggesting a lure for downloading a song, which is then followed by the malicious redirector URL and numerous other PDF links hosted on Shopify. The ML classifier strongly indicated maliciousness.

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.cc/wix?keyword=download+battle+scars+guy+sebastian+mp3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/canyon_web_camera_drivers_cnr-_wcam43_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1637/8773/files/vimopalirepamu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/atmel_avr_studio_6_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/tevikawarelavifa.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ee411929aed468eaa0a2edda25113f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_903ed052b9164704967317d2aaf1eb30.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e555a8fb9454e799ab6494884fca9d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0003321d600c4ca7967a273a0d5821d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_bfe4b25bd3ae4f6299dd6680bcdcd65b.pdf
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/kusuguk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/58195314822.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/nosafirusajej.pdf
    • https://cdn.shopify.com/s/files/1/0431/8458/6903/files/like_mike_pelicula_completa_en_espaol_latino_descargar_mega.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/pdfbox_java_api_documentation.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419705ab4874e0bac4a3c4176785338.pdf
    • https://static.usrfiles.com/ugd/b8c837_fad2644dde6c416dadeb2f417ec578bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bddd9dbab824720ad073600196511af.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ffc.bin
c83c6a76d1951d9c71f398b33690684e475688ad07542d1cd75ee52a79959c0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FFC 5772 bytes
font_01_sfnt_off000063a3.bin
23f60912f2b49f8d2c23c4cfbc421e28e07ddf46cb43842320ffd49bb1199f4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 15044 bytes
font_02_sfnt_off000092cc.bin
dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92CC 18776 bytes
font_03_sfnt_off0000b033.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB033 4324 bytes

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