Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c7f5c514d3d6db5…

MALICIOUS

PDF

43.6 KB Created: 2020-08-18 15:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae72ff581ba6ef7cd38fddda3b5059aa SHA-1: 90bbb283b1ed6ed8a69bf4f18d6277daf92261d6 SHA-256: 4c7f5c514d3d6db56f9a628b8f3ae7c8908cbbf7d695117202648d3dabae05a1
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=corporate+information+classification+standards+and+protection+procedures'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0433/9017/3333/files/ipcc_report_1._5_degrees.pdf' being the first identified. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document is designed to trick users into visiting malicious sites.

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=corporate+information+classification+standards+and+protection+procedures
    • http://files.sunsethealthsafetyproducts.net/uploads/1/3/2/6/132681488/6838983.pdf
    • http://files.deltronenergy.com/uploads/1/3/1/1/131164364/kapaxofibig.pdf
    • http://bimowi.crossroadswsks.com/uploads/1/3/1/3/131384635/deketonoreduri.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/ipcc_report_1._5_degrees.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/82858178111.pdf
    • https://cdn.shopify.com/s/files/1/0428/6581/9814/files/giraparaxawukokup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6296/0023/files/nifeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/2835/6000/files/61320817631.pdf
    • https://cdn.shopify.com/s/files/1/0437/6585/8455/files/muzizafujosejixo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/zidudopuvidubojixasuvako.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/kerala_driving_licence_learners_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/3288683709.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/jajet.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_off00006d0c.bin
67c2ccaba7824c21b69c7429fc54305ce0bf914e72c764a0aabac1882077a446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0C 5208 bytes
font_01_sfnt_off00007ea1.bin
f919063a05eb38d39111f4b0f46a3773c104272fc2c475be4d335e1c15539104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA1 10116 bytes

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