Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db429297720c4e7…

MALICIOUS

PDF

35.4 KB Created: 2020-10-29 22:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 96d7d81400c10e319e6895371635787b SHA-1: e08131beea7bc580ece718b4cbc3df54d3850aca SHA-256: 3db429297720c4e746ec104ad9800bd83ee6276fe4f0efc18fb56ca0f6336b53
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains a URL that matches this redirector. This suggests the primary purpose of the PDF is to trick the user into visiting this malicious URL, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=shadowsocks+apk+old+version In PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/1801234.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/gixelosi-xizivudoguja-nofusivu-bosamuzepixan.pdfIn PDF document text
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/wabigipubip-rabegit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f906c4f73686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5f8db183c1345.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f88b57d85385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8d154b3203f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5f9a159b812ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5f9938063bee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_5f9a22b66bdcf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bidivo/dakelowoki.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/75891476570.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D33 5480 bytes
SHA-256: 32ccda96837112dbb609309432cdc7ff07ad9e1f0e1a5cd4692959ce14e9b01d
font_01_sfnt_off00005fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 9916 bytes
SHA-256: 2d0da6e0c86a63c9727c3ff42f3de3412db727117e2a89bf3af1395e569799a0