Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd501766850bce6…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 05:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a2ab627d083ea59ee5f17f3392cb98a SHA-1: db18900ed7d39cc426f4ad58c14142309b35045c SHA-256: dcd501766850bce6be359164202b770aab1549dc86e666a3efdddb425435a3c6
150 Risk Score

Malware Insights

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

This PDF file contains a malicious redirector link disguised as information about Apache Tomcat. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic fired, pointing to the URL https://ttraff.ru/pify?keyword=apache+tomcat+version+6.+0+free. The document body is heavily obfuscated but contains the same URL and a reference to wkhtmltopdf, suggesting it was generated programmatically to host the malicious 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=apache+tomcat+version+6.+0+free
    • http://files.olivetreebiblebook.com/uploads/1/3/0/7/130776141/jemiga_bosinev_gowonosen.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/93398363665.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/58768638265.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/44534225050.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/62947657888.pdf
    • https://cdn.shopify.com/s/files/1/0450/8683/4851/files/laviv.pdf
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/55839850947.pdf
    • https://cdn.shopify.com/s/files/1/0434/5302/2369/files/38283379080.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/godonotojoliveg.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/kanixozub.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4496/files/nanapesabasulijarubufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/gimp_save_as_png.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_off00005899.bin
93d4e6a6f5b6f9751dab4478ea0f8e4c1ef7f56008563a7b29d75e8945504ec2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5899 5600 bytes
font_01_sfnt_off00006b84.bin
32669c6a731ed6959aad200a47216f0978746db0a95d01d1c97b5e1aef75566f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B84 12096 bytes

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