Malicious PDF — malware analysis report

Static analysis result for SHA-256 4497ab4d5b4556e4…

MALICIOUS

PDF

45.0 KB Created: 2020-08-23 19:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac8dc75ab52245954c1864456ef55f66 SHA-1: 7c550a4fd6aea9ad208d45b4c27dea60c81d5554 SHA-256: 4497ab4d5b4556e472a15d5d39296e958adc25af348bd8ab8dbfeaf78538acce
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains text related to 'cute monthly budget template excel' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also flagged this PDF with high confidence.

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=cute+monthly+budget+template+excel
    • http://files.maconmilestones.com/uploads/1/3/1/6/131637374/deroxolokukuzun.pdf
    • http://mefufola.emmabenic.com/uploads/1/3/0/7/130776078/poboluvenaxozusiw.pdf
    • http://gobikodos.dancingwiththelocalstars.com/uploads/1/3/1/1/131163599/e489f4aef79.pdf
    • http://files.gz-zalec.org/uploads/1/3/1/4/131483254/3889125.pdf
    • http://fenorokan.clevercanidae.com/uploads/1/3/0/9/130969204/xagorodeworenuzanij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4564/files/eagle_scout_congratulatory_letters.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/talafebutak.pdf
    • https://cdn.shopify.com/s/files/1/0455/4637/3285/files/tchibo_cafissimo_entkalken_bedienungsanleitung.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6778/files/jizaxejilap.pdf
    • https://cdn.shopify.com/s/files/1/0439/4011/8683/files/cartoon_hd_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/bezemaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/dollar_tree_job_application_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/29539406378.pdf
    • https://cdn.shopify.com/s/files/1/0437/7336/2325/files/58309753610.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/flower_garden_images.pdf
    • https://cdn.shopify.com/s/files/1/0435/4578/8584/files/mepowoke.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/29820518266.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/java_7_32_bit_archive.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/dch_file_ting_trung_sang_ting_vit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/jenkinsfile_code_coverage.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_off00007022.bin
9aa7ddddeaa4a0259fafd6d569d9b3f3af20fef0fee88489e9f37410140d5551
pdf-font-stream PDF embedded font (sfnt) at offset 0x7022 5428 bytes
font_01_sfnt_off00008279.bin
9e26794a2441fed5faca4495c6a9b01278bc1c0237befc42d9fb915314d877a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8279 10532 bytes