Malicious PDF — malware analysis report

Static analysis result for SHA-256 df94e80cd34a7c62…

MALICIOUS

PDF

52.1 KB Created: 2020-08-25 04:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9834d8c70c0854a4fd165b90a2586e34 SHA-1: ad61b8cbe324cbc745a3f67307a14a8008db25a6 SHA-256: df94e80cd34a7c62c1a7fdadfbaa06e658bebf7aa69c04b0a44e249eb0f49c15
150 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and part of a link farm, with ML classification strongly flagging it as malicious. The embedded URL 'https://ttraff.ru/pify?keyword=ct+coronary+angiography+reporting+template' is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ct coronary angiography reporting template' and the malicious URL, suggesting a lure for users to click the link.

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=ct+coronary+angiography+reporting+template
    • http://jevarizo.scoilursula.com/uploads/1/3/1/3/131398091/sewogokusatofo_fegusa_kevatotir.pdf
    • http://sitome.lakemountainskipatrol.org/uploads/1/3/1/4/131455663/900263.pdf
    • http://fodexa.perchancetheatre.com/uploads/1/3/1/3/131384600/a803713e2fb1d8.pdf
    • http://beputa.artistnik.ca/uploads/1/3/1/4/131438539/2434016.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/9904967293.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/damepowola.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/xurapadoxigazujulutebex.pdf
    • https://cdn.shopify.com/s/files/1/0434/6730/9206/files/87890222459.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/fl_studio_12_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/drawing_angles_using_a_protractor_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/sodogetavawopafebuxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/lucknow_university_b_tech_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/74837521807.pdf
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/73677931991.pdf
    • https://cdn.shopify.com/s/files/1/0459/6763/8695/files/ami_bios_update_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/2287/4781/files/burner_app_mod_apk.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_off00008e4b.bin
f52ae80e1ba7139c86b14145925e6b563fcf40614988c629eb7a2846d7c732b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4B 5176 bytes
font_01_sfnt_off00009fbc.bin
e834bb327d43f783f18e64ac8a5cedcf35f5c6b647e96dc8b941ba9139918487
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBC 10436 bytes