Malicious PDF — malware analysis report

Static analysis result for SHA-256 65476282d4f9bce0…

MALICIOUS

PDF

64.1 KB Created: 2020-09-02 14:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58cb5651e559440cf29d80b82e918323 SHA-1: 3b99816ef4295469edd43e9351048f0530707c43 SHA-256: 65476282d4f9bce044c6809998eceafbe872995ec6f40943a85ac40d1a30f73c
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'piano sheet' and a URL that appears to be part of a link farm. The presence of multiple external links, including a malicious redirector, suggests an attempt to lead the user to malicious 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.me/wix?keyword=let%2527+s+kill+this+love+piano+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1138/files/tuminetijotezurafudimum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/zixufi.pdf
    • https://static.usrfiles.com/ugd/de65f7_3c40456c9e7b49388013c684d2dce21d.pdf
    • https://static.usrfiles.com/ugd/0047a4_31c1b5f0cf7748b9a98dc2c65079ae64.pdf
    • https://static.usrfiles.com/ugd/f65518_656a2a92e379490c9e3f53420ec98838.pdf
    • https://static.usrfiles.com/ugd/1df9ea_53717cf971844dc38e11e7515d382c38.pdf
    • https://static.usrfiles.com/ugd/b8c837_86b54a4779884ccc938a13b2a93799e8.pdf
    • https://static.usrfiles.com/ugd/162fe6_25dbfbde1a214f89a91b431763f801df.pdf
    • https://static.usrfiles.com/ugd/a76634_e6d547b0e9554349b9e803bb44616c01.pdf
    • https://static.usrfiles.com/ugd/3826db_8ee8991ee7754165b5d846f4908b9c82.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://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ba1.bin
172ce40d250a5291d1f5f67acb382c33cc2e9b0ce7a8627b3c462a3aa912403e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA1 12404 bytes
font_01_sfnt_off0000829d.bin
ff9e1bfc384ddb11ff7982a00bae69aefdf4ef13461faa542ab7a91dcc37654e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x829D 4912 bytes
font_02_sfnt_off00009352.bin
47957ccbf3dd53d93afca486ae3ab8a0517567def15c51a920841334281073af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9352 8272 bytes
font_03_sfnt_off0000aa69.bin
9d13cd09ac50b400ad7e039908036d9757289e97d11fdc823a85cf239b106199		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA69 15912 bytes
font_04_sfnt_off0000dbc1.bin
dbf142a5ee5912dba0d06f749c68ada68fc433a58d5d71ae416dbac8ced49b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC1 16080 bytes

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