Malicious PDF — malware analysis report

Static analysis result for SHA-256 5934c7f87f440f5f…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 06:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 646af69d7587d3dc00abd38ce5af9e5a SHA-1: 00d745b9fd09358a380902b7effb75eda83dbfa3 SHA-256: 5934c7f87f440f5f69b32730b10f4403d3a37607981d9d7e4c1a9df8c2e5d41d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/wix?keyword=organic+apple+cider+vinegar+weight+l', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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/wix?keyword=organic+apple+cider+vinegar+weight+l
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/java_8_interview_questions_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/wodedinixuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4102/1334/files/wanugevoduvafipurobebuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/85865269464.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/deductive_and_inductive_method_in_economics.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0517/files/40908197607.pdf
    • https://cdn.shopify.com/s/files/1/0435/3743/2744/files/nitezixaladufope.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/sita_bursary_applications_2019_academic_year.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/37180432315.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/rezum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/21367148888.pdf
    • https://cdn.shopify.com/s/files/1/0436/5431/6197/files/32518987094.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/temigabezak.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/customer_centricity_model.pdf
    • https://static.usrfiles.com/ugd/7603ae_914b928e8236402a8c8506efaa2797ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_4263e917e5ab430bbce7e8548f6d2abe.pdf
    • https://static.usrfiles.com/ugd/5b9365_db36440053f14f3d898a3392bbb670fe.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068bc.bin
3f2ebdbce0d25cc043a6d3d2daf0d8f578ba528f153c5e78353f1b9562689071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BC 5336 bytes
font_01_sfnt_off00007ae7.bin
71d123a8ee0b09240357a5df141b6f5de388ecbe1049ff79385af53f622c0480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE7 9952 bytes

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