Malicious PDF — malware analysis report

Static analysis result for SHA-256 026286cb1e634f5b…

MALICIOUS

PDF

45.9 KB Created: 2020-08-13 21:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb09f4ce90dd2ac4c842f992f92d71c7 SHA-1: ddf15d51f99accdd4bd5847e6007789d868b01da SHA-256: 026286cb1e634f5b2e7b4dc9b9e5d625965cc7532b34e41be5f28bfd1079edbd
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to what appears to be a link farm designed to generate SEO traffic. One of the primary links, 'https://ttraff.cc/pify?keyword=cyberghost+6++mac', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL, indicating an attempt to direct users to malicious infrastructure.

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/pify?keyword=cyberghost+6++mac
    • http://files.reveirterlabradors.com/uploads/1/3/2/7/132741556/pafiwamemunak_vekin.pdf
    • http://files.timewithschweitzer.com/uploads/1/3/1/3/131384113/titikolazi.pdf
    • http://files.fjsac.org/uploads/1/3/1/8/131872070/wadisadezelurire.pdf
    • http://files.shiveringstringswest.com/uploads/1/3/1/3/131382078/4503a9.pdf
    • http://files.sirreadsalot.com/uploads/1/3/2/6/132696015/mozoverip-fevipibi-zozopugaje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1045/6730/files/roxio_vhs_to_dvd.pdf
    • https://cdn.shopify.com/s/files/1/0431/2200/0029/files/4214224220.pdf
    • https://cdn.shopify.com/s/files/1/0447/6734/6839/files/gcaar_sales_contract.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/83045816823.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4449/files/12481192715.pdf
    • https://cdn.shopify.com/s/files/1/0434/1900/9189/files/html_page_to_jquery.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/gabanesil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/cateterismo_vesical_masculino.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f5e.bin
ffbbdbf78b7e6d55b20962e5770a57ddd257fd3492a74f4e6388c18f629e9b11
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 5480 bytes
font_01_sfnt_off000081ec.bin
ea71b24230f412712fd031d642594dce8990b0ca4466aeb9ac24bfa21f0e568b
pdf-font-stream PDF embedded font (sfnt) at offset 0x81EC 12768 bytes