Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf06d9f28360dce…

MALICIOUS

PDF

45.7 KB Created: 2020-08-31 04:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 940e32240ec1b4336de96265d182cf10 SHA-1: 9bc34d49986b66103b1d4fabf65fa779ee18e688 SHA-256: 5bf06d9f28360dcea882dd0421acaa0183ecdd92e7abcdf41b00345ee5e2e5f2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDFs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=purple+eyes+actress', which is flagged as a malicious redirector. This suggests an attempt to direct users to malicious infrastructure, potentially for phishing or malware distribution.

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.com/wix?keyword=purple+eyes+actress
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/5bb01c_a6967cfebf1a482ea19219f39a201337.pdf
    • https://static.usrfiles.com/ugd/902d29_bf145a011da64435b54cfbf457bde2f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f4a2c07e0b840fabca3136754149fbb.pdf
    • https://static.usrfiles.com/ugd/82e28d_80ab76be4a3c4e5496cd3a5209a8b3f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7eb12e43ac1a4dfba1729cfb09986dba.pdf
    • https://static.usrfiles.com/ugd/95089d_112b60c8ce3b4beea9efffa98007642d.pdf
    • https://static.usrfiles.com/ugd/b8c837_54a2691d9d394dd08f3885814c2e06d0.pdf
    • https://static.usrfiles.com/ugd/aef5b7_fcbba4a0cb004de5be41523c336899ba.pdf
    • https://static.usrfiles.com/ugd/41a0b6_ed5985df941e421d8bc12862d43ff276.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9a76637d0b0456eb2d7cc0d08568385.pdf
    • https://static.usrfiles.com/ugd/26481d_fc403f2f6ba74bd1a254e7092e137a77.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/vazuxamaxamukitetumumezom.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/direct_burial_cable_spec_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/pomotugutoramigeba.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000689d.bin
1a33a29d1b97100ca034d84540394d98bf6b7947cbcc40f1f6bc51bb7dc8c263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689D 4648 bytes
font_01_sfnt_off0000787f.bin
6b1bcaa413418908f0530d51d6523129848a862c2fbb556549071f8c114e89e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787F 10392 bytes
font_02_sfnt_off00009c0d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0D 4324 bytes

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