Malicious PDF — malware analysis report

Static analysis result for SHA-256 e081cde2a9b241e1…

MALICIOUS

PDF

39.1 KB Created: 2020-08-09 20:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca5d7d2cbd946be73401cf4476fd845 SHA-1: fbcbc01107a27e20d31cceb3bcf39c330763ce5c SHA-256: e081cde2a9b241e1a299c0cffe5633ac74bdf4aa9d12782d6a4f39f252386098
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=join+pdf+files+command+line'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0434/8785/4749/files/baraxanagaxilabip.pdf'. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to disguise malicious activity under a plausible pretext.

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.
  • 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.
  • 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=join+pdf+files+command+line
    • http://files.diamondlodge83.com/uploads/1/3/2/3/132303163/a7a51d6403f835.pdf
    • http://files.global-banking.net/uploads/1/3/0/7/130738725/xaserikun_tomojosovorak.pdf
    • http://tetod.mrgroucho.com/uploads/1/3/1/6/131606289/bad8c5.pdf
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/baraxanagaxilabip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/33292122448.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/abscesso_dentrio_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/gibenebazir.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1123/files/51466063106.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/40239485813.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/dictionnaire_technique_electronique_anglais_francais_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7281/4245/files/mofogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/kiwaribopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/80879671007.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/69486285378.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ae0.bin
06bed1dae9322f21539b1e14b0ecade8fa1fe02acd9f92c893f3d52cc7bdcdff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE0 5196 bytes
font_01_sfnt_off00006c81.bin
6997c698db6b8c7592f97ac87ddd59eadc66bdb7e06c5bccf04957befff629cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 10300 bytes

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