Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8638e42a3686c0…

MALICIOUS

PDF

43.0 KB Created: 2020-09-08 09:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ebb43446e47a7d1166b7a1ad0ee86e90 SHA-1: d0e1df9a543eb4183e23b6eef57892482e6eb04e SHA-256: 0d8638e42a3686c064705732e486057351ad7807af393c448726329f79ba755e
154 Risk Score

Malware Insights

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

The PDF document contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Whatsapp watusi gold ios'. The presence of numerous external PDF links suggests a link farm or redirection scheme designed to lead users 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.cc/wix?keyword=whatsapp+watusi+gold++ios In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2c354ab937614221a690f8e5650ebb8a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/89064d_43b39eab47d4448d973e852c4b4248d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fa32a6_27da37f6e054469aa94493334a0b95fe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9fc8c3_cf6a9339f479441fb5cdc8dff93d1321.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b5472a_0f6fca2a42de4d1480e37bd2ee48668c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ac8c68_20dffb7b96b54962b3b61ab3a5cc112a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8d0191_a868592fc6ba4c9d991a96421ce346fc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7008f3_3eae724601ce436b89de8586a9df5a1f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/46429b_30c72c7ae0be49cc988c3cbc54ad2213.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8bf31c7c142f4e958bbff2bf0738e565.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9f6a24_6650746369bb46aeb61828475fe27098.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBF 4888 bytes
SHA-256: 631293c36b3c49f1149c2d4b248a15d80f8a5b408c11af165b34839bd40435f8
font_01_sfnt_off00006f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7E 9936 bytes
SHA-256: 5c3dafb34f8fddeca31d0cc31afe11613bcbf7aa381c0c88ea3447b6ec9dcaa9
font_02_sfnt_off00009187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9187 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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