Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bcd3dd6d6a7aed3…

MALICIOUS

PDF

62.3 KB Created: 2020-08-21 23:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20949d89fbcad7e72a8f9ff296d41c3 SHA-1: 460d61bf4ebcc086743f5fd1e00803cde64481e1 SHA-256: 8bcd3dd6d6a7aed33efe2ad6f141b88e16649b29786253a19c6f78175dfe16ba
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure for an 'Rrb admit card link' and includes a call-to-action phrase, indicating a phishing attempt. It redirects to a known malicious redirector URL (ttraff.com) and also contains a PDF link farm pointing to various shopify domains, one of which is also a potential download source. The document body, though heavily obfuscated, contains the malicious URL.

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=rrb+admit+card++link
    • http://zomuwuwed.riverrockgems.com/uploads/1/3/2/6/132695278/1885065.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76410179135.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/64915070511.pdf
    • https://cdn.shopify.com/s/files/1/0440/5559/3110/files/bakup.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/1975_chevy_blazer.pdf
    • https://cdn.shopify.com/s/files/1/0435/0282/9734/files/nogaten.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/67472178879.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/73647203957.pdf
    • https://cdn.shopify.com/s/files/1/0454/1018/9480/files/analog_and_digital_circuits_for_electronic_control_system_applications.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/asana_pranayama_mudra_bandha_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/29128314154.pdf
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/averitt_bill_of_lading.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93434530871.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/12_month_cash_flow_statement_template_xls.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/lelivokagetexuwirumaro.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_off0000ac82.bin
107002db14ba165a1a683180b9f391888da1122741facfa1900f82deb7e89663
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC82 5120 bytes
font_01_sfnt_off0000bdcd.bin
3a6a5ad4017f66ec0ebbd7c19e69c0a1970b265a23ce2bbb7bc1bbcf5231b0f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCD 15032 bytes