Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32511de29bba65a…

MALICIOUS

PDF

39.4 KB Created: 2020-09-06 02:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6fe5d219610a2e4c0cfbae2a9d95d66c SHA-1: faf56238cfe82ae953440b8f4d8be8b40e83ee11 SHA-256: c32511de29bba65a9470e8552934edae573f33df46a8222d18697df7b4dc76b7
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.link/wix?keyword=joining+report+form+for+central+government+employees', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to government employee reports. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm tactic to obscure the malicious URL. The ML classifier strongly indicates 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.link/wix?keyword=joining+report+form+for+central+government+employees In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/510a18_9ae521d51a104c5895d59475812e980f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3834b_a078f2dd34e747eab374bdb341f327b0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3aee12_199b6aef062346f780dd27c84272bcfc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9cb927_6fe6ebb32f4440dfa3472957ef49fb21.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d5d855_bbd7c80b0502463088e1d99ad55b2b8f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/628a76_f4479078fddb43baa9755ebe0cb6a937.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b5472a_ca98a9c823cd4af696a960c809618029.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e1ae8f343bd748f196de2dd10a9b0603.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01e791_f4f28a0caf8c4439ab34cd743ea863ef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2647/2347/files/tisubipebam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/25367962075.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc03df_59ed89fbf16f4a4ab8b0416fe683b80a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0b46e6_7ea6f76c851340fc9c4c275b9819e7d3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a771bd_eced5fced7d94b05aad2410a7e3d6aa6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/69695d_701190310ff848959ed1baed9e1c9f75.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/105a8c_7ad05297bf8c4b2dbd62a5824f7a2b66.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_off00005a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4A 5484 bytes
SHA-256: 097c53ac3d8353be96fbd6718adfea997c10a18963d6de74ae6c4386d8a94ce3
font_01_sfnt_off00006cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 9796 bytes
SHA-256: 6c5b6e5bda8b01912dcacfcb8d06ad9e3b21799cb3a658001410175744630480

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