Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbb7a38245197b2…

MALICIOUS

PDF

42.0 KB Created: 2020-08-04 04:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1784ba197d9075c452a7aa37b6c5fe6 SHA-1: 57d813711d71bfdc66021d1fb65b323735995b2d SHA-256: 1dbb7a38245197b29027aace024e6408cfcb3d73a349a4cc06f7835a93e17d7b
150 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm for SEO manipulation or to distribute malware. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of a malicious redirector URL is a high-confidence indicator of malicious intent.

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/wb?keyword=download%20ebook%20kopassus%20untuk%20indonesia%20pdf
    • http://files.newtonwellness.org/uploads/1/3/0/8/130874495/bewepenula_gewuporaza_lajupiriv_xigabep.pdf
    • http://files.nataliemariaclark.com/uploads/1/3/1/4/131408432/f003613619e53.pdf
    • http://files.westport.votersguide.info/uploads/1/3/1/3/131382018/zasiwewebab.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/44145474558.pdf
    • https://cdn.shopify.com/s/files/1/0432/1473/3480/files/12086164296.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/rimip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/88386240640.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/tiravituturukexalifuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/32811938505.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/27231400006.pdf
    • https://cdn.shopify.com/s/files/1/0440/2459/4597/files/34022250463.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/warcraft_3_version_switcher.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/usps_delivery_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/pipijebupipawobowadobe.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_off0000669b.bin
d182735da4813e60bd7773b2455718f2b6d6e20436767e5d92302a1233416c08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 5232 bytes
font_01_sfnt_off00007891.bin
b04b49e7fa0401ff25a5fc22e068a9cc4c4040317449b9bf03e0972b4046c074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 10032 bytes

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