Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee7d500cf025dbb…

MALICIOUS

PDF

48.6 KB Created: 2020-08-18 17:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c60f1c62adbd6d61cef2050dd277bbf SHA-1: 2e9af0782bf4084299e2a45f61d02145f010c607 SHA-256: dee7d500cf025dbb5f6586c35e5bab8b6a544c6f720fae5d1c4e9bd0ae7e1e3a
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 pointing to 'https://ttraff.ru/pify?keyword=fun+addition+and+subtraction+worksheets+4th+grade'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0439/0898/9096/files/sijux.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting the document's primary purpose is to drive traffic to malicious infrastructure.

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.ru/pify?keyword=fun+addition+and+subtraction+worksheets+4th+grade
    • http://files.justballoonshawaii.com/uploads/1/3/1/4/131438018/zopesemovupuz_kirawedure_dizijewefevire.pdf
    • http://vugitape.rarefieldcattery.com/uploads/1/3/0/7/130776089/76a698.pdf
    • http://zuvugofaf.deiduemondi.com/uploads/1/3/1/3/131383314/1413362.pdf
    • https://cdn.shopify.com/s/files/1/0439/0898/9096/files/sijux.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6341/files/8248606381.pdf
    • https://cdn.shopify.com/s/files/1/0439/1629/6360/files/redarumarigepejanunejovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9137/7828/files/lonomujoxufepazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3951/5039/files/afcat_exam_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/32693915269.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/18064906026.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/jevujagaruxususexenu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/antipatterns_refactoring_software_architectures_and_projects_in_crisis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1562/files/govefuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4262/files/job_application_letter_with_resume_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/6400/8610/files/wijuvabowomibosodi.pdf
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/rate_confirmation.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8658/files/borderlands_3_legendaries_list_spreadsheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007246.bin
c51d8dbad2a087ca27025d025bc95713b5cd3f43b32baf72bb695671200b21ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7246 5392 bytes
font_01_sfnt_off000084ab.bin
6cee93a96bbc69be8c585ba397c14c96bbeb5ef23b42c394d7b4704668b200c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 9992 bytes
font_02_sfnt_off0000a6d3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D3 4324 bytes