Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d366c94651eb20…

MALICIOUS

PDF

45.6 KB Created: 2020-08-07 22:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a443b2b21f21e4e075e0163829531b SHA-1: aced63a2a739cd67ec10955b33868a4bc4b48162 SHA-256: 85d366c94651eb206361c08af04b2a2db5a848172a3184446a43dc94ca11461a
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a catalogue for electrical components. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various Shopify-hosted documents. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document leading 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.cc/pify?keyword=catalogue+disjoncteur+schneider+pdf
    • http://files.lifewithsoosan.com/uploads/1/3/1/8/131859261/7749268.pdf
    • http://files.iscariotstories.com/uploads/1/3/0/7/130738620/7f48eee3c.pdf
    • http://files.jessicacollaphotography.com/uploads/1/3/1/1/131164159/7708086.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/79945945723.pdf
    • https://cdn.shopify.com/s/files/1/0440/0244/3422/files/china_s_one_belt_one_road_initiative.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/75307748825.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6685/files/dasakag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/fumufaxoxix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/jefavomomoridekijigar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/41165303502.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/group_shifted_strings.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_off000063c8.bin
2be3ed840cecca78dd1f55aaad2d69f6794846f87712a8a5eaf0f3e554db1f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C8 5400 bytes
font_01_sfnt_off00007621.bin
ab38255ea90438cf052ea4915960faeb4dd77403c99a851cd5fcf12e87accc6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7621 17148 bytes

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