Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29f29902c4090e1…

MALICIOUS

PDF

42.7 KB Created: 2020-08-21 03:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af1d4faadc54e5a3157f787c65dc1a5e SHA-1: daa8000493f8322d4627b4e444b1cde19e763411 SHA-256: e29f29902c4090e1c459024c977b5ac137c20e88e1c16f2177b041368e49690a
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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=english+dictionary+voice+pronunciation+free', likely leads to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to benign Shopify URLs but some to unknown or potentially malicious domains. The ML classifier strongly flagged this PDF as malicious.

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=english+dictionary+voice+pronunciation+free
    • http://babiledi.aspireimmigration.ca/uploads/1/3/2/7/132741389/8147843.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/cours_brucellose.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7221/files/14959334255.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/bigokelilokaxokuxefibeka.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/nevisamudofifelevexo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8406/9526/files/probability_activity_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/92227467351.pdf
    • https://cdn.shopify.com/s/files/1/0434/2687/3509/files/rebif_package_insert.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3297/files/balancing_chemical_equations_phet_lab_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1650/0886/files/advantages_and_disadvantages_of_verbal_and_non_verbal_communication.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/16827973648.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/95360625914.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/jonuto.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/kafirutufawovekatadegeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4743/files/8290490821.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/73118219495.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_off0000677d.bin
967b075b34d084c4cb34645abc5cee3721f6b93888c30b3989e6ee1b7a50daf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x677D 5536 bytes
font_01_sfnt_off00007a56.bin
dce513419be4fb8d00cc3a427dfd5d3f0838a478fc8f33de6b5db4cac8e4a077
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A56 10340 bytes