Malicious PDF — malware analysis report

Static analysis result for SHA-256 23fe01f673565938…

MALICIOUS

PDF

43.4 KB Created: 2020-08-02 02:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb5d04421c2461e341b97fc794036b8b SHA-1: e8916e4d0859f1330601452012faf4407e23b9ad SHA-256: 23fe01f673565938934c54ffc6e7215977e7f24294b51f497f1290973179d64b
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as a manual for a Fluval 406 filter. The document also functions as a link farm, pointing to numerous other PDFs hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering, luring the user to a malicious site via a seemingly innocuous document.

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=fluval+406+manual
    • http://files.cascadiancouriers.com/uploads/1/3/0/7/130775320/vubomexabadume_bezexinosod.pdf
    • http://files.abnerhershberger.com/uploads/1/3/2/7/132710759/8611970.pdf
    • http://files.starburstactivation.org/uploads/1/3/1/3/131380297/bizumivitigaju.pdf
    • http://files.robertbiederman.com/uploads/1/3/0/8/130874253/rulasurodaravur.pdf
    • http://files.nickinaudephotography.com/uploads/1/3/0/8/130874567/nodosixo-juxuzotevuni.pdf
    • https://cdn.shopify.com/s/files/1/0430/4997/5961/files/xakobunis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6325/files/63522307412.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/convert_to_vertex_form_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0430/5790/5818/files/32939786288.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/2341841727.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/xapikaxenafikit.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/97118545522.pdf
    • https://cdn.shopify.com/s/files/1/0435/5329/2440/files/84320104615.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2840/files/5391768306.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/21395964887.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/71668477869.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/36553477823.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/moxapenaritumixunajaxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/12691049807.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/36446067824.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_off00006cd2.bin
33140008aff1b1d81ef2318c96010605c804b5945fc8765b48662187403c13a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD2 4956 bytes
font_01_sfnt_off00007dad.bin
6e089db79ac76645d963d6b164dab44f33408f005f7b24b9881c875f6ed678f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAD 10332 bytes