Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b67a0d2d6f2748…

MALICIOUS

PDF

44.9 KB Created: 2020-08-22 21:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be41350fc99e42952bba62ab672021fb SHA-1: 56cdb4610cf7187ecb22a3a43e3b3a569dbdbf47 SHA-256: c5b67a0d2d6f2748541ee738f006fa4cd0f3805fc823304d9c058e2f31db884d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to lure victims. The primary malicious URL identified is https://ttraff.ru/pify?keyword=calcination+definition+pdf.

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=calcination+definition+pdf
    • http://vujaz.rickkeyesmusiccaravan.com/uploads/1/3/1/4/131453215/fatuwituvonim.pdf
    • http://files.themakeandcreateshop.co.uk/uploads/1/3/2/7/132740756/rawafifiz.pdf
    • http://kipux.collegedreamsconsulting.com/uploads/1/3/1/4/131406535/9eacbaffa643065.pdf
    • http://files.amorehairdesign.com/uploads/1/3/1/8/131857117/3506377.pdf
    • http://files.anglia.nl/uploads/1/3/0/7/130739415/7c07c53.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/associated_press_stylebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/99111070550.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/puxoteb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/32716139715.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/34394450817.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/races_of_the_wild_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/saxexawonasep.pdf
    • https://cdn.shopify.com/s/files/1/0434/6524/4832/files/76120056210.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/hitman_a_technical_manual_for_independent_contractors.pdf
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/rupofo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8277/files/caresource_ky_appeal_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/paint_tool_sai_brushes_download.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_off000064ff.bin
2ce6dc7d891c1a8c87167b3b2f4dae4271f81f838631154236e71f047bc6dda7
pdf-font-stream PDF embedded font (sfnt) at offset 0x64FF 4688 bytes
font_01_sfnt_off000074fc.bin
12e639c6a715738ca8cdff76c643a24d655ac1a60d24332636a72bdb9d368f50
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FC 10480 bytes
font_02_sfnt_off000098b9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x98B9 4324 bytes