Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c78f9f8d2d34540…

MALICIOUS

PDF

45.9 KB Created: 2020-07-31 01:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3748a3cdbf89ccd231d3947c9573852 SHA-1: b43eb6eb75c154d37242fa18e2735a23d1224805 SHA-256: 3c78f9f8d2d345404556af143ad8df8f0331d5b829d2df2e140b6a0bcc19b303
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious redirection and a link farm. Specifically, it links to a known malicious redirector at 'https://ttraff.com/pify?keyword=calliduscloud+commissions+pdf'. The presence of numerous external links, many hosted on cdn.shopify.com, suggests an attempt to obscure the final malicious destination or to leverage legitimate platforms for hosting malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=calliduscloud+commissions+pdf
    • http://files.priscilajamison.com/uploads/1/3/1/3/131382470/180541.pdf
    • http://files.hiredentalstaff.com/uploads/1/3/1/4/131437806/816324.pdf
    • http://files.studioplumpiano.com/uploads/1/3/1/3/131383497/70178f76b.pdf
    • http://files.patruus.com/uploads/1/3/0/7/130775833/4151211.pdf
    • http://files.portugal-spainmarinesurveys.com/uploads/1/3/0/7/130776327/ceb020bc7.pdf
    • http://files.patruus.com/uploads/1
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/laxosiwezotasitot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/javim.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/79809632993.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/ligopudada.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/kodaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/90600921879.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/morufufeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/54583942684.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/29826546809.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/wikapuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/16395722241.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_off00006f25.bin
c25e8ba86fe65ae06116979263529eb8367e7bb81fe14219f22d38615e9fcb7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F25 4912 bytes
font_01_sfnt_off00007fbe.bin
47da24933df7d636f027eb7e43790c34b47bca5e4774a3e91f6e84fbc2421886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBE 13688 bytes

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