Malicious PDF — malware analysis report

Static analysis result for SHA-256 efec15ca4c468393…

MALICIOUS

PDF

98.2 KB Created: 2020-09-08 02:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68291c23cf4353ab67659672cbdd3de2 SHA-1: dcca83d9514aa19eaa974311c445207d7b05a4a0 SHA-256: efec15ca4c46839349adc9fabde3db6f15c8822aa1eec4f4a7f3ff3ed59f7859
120 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.ru/pify?keyword=the+business+blockchain+book+pdf'. Additionally, another critical heuristic indicates a PDF link farm, with numerous links to external PDFs, suggesting a spam or SEO abuse tactic. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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.ru/pify?keyword=the+business+blockchain+book+pdf
    • https://cdn.shopify.com/s/files/1/0460/6951/4404/files/8918293144.pdf
    • https://cdn.shopify.com/s/files/1/0457/3324/9190/files/20947377714.pdf
    • https://cdn.shopify.com/s/files/1/0437/6277/8264/files/1st_birthday_invitation_online_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/libexuruxiviwunoxofile.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53681635306.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/dutaba.pdf
    • https://cdn.shopify.com/s/files/1/0463/0868/8034/files/jigatulodobowizokedilevu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3606/3397/files/free_expense_report_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/7733473163.pdf
    • https://cdn.shopify.com/s/files/1/0439/1341/2760/files/pejovuzaxuseg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4966/files/ocean_currents_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/color_hex_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/70802807397.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/introduction_to_mathematical_biology.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/varanomavumozomadeda.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/52543416702.pdf
    • https://cdn.shopify.com/s/files/1/0448/3599/5808/files/organic_chemistry_solution_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010242.bin
97edc876ceb16603d288e3e0f960a8c03147f47221b0aaa141a1a5039d6dfbee
pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 11328 bytes
font_01_sfnt_off0001274a.bin
f6b81eb26faa9fe8e83c0987a4c93ef40828dd2d884a3f6829f67a2e1facb17a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1274A 5104 bytes
font_02_sfnt_off0001388e.bin
8632781c9274a90a006f6eed22a4cc01633b592f96b2dc557766eadfb2e0a7fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1388E 16824 bytes
font_03_sfnt_off00016cc3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x16CC3 4324 bytes