Malicious PDF — malware analysis report

Static analysis result for SHA-256 d286fce7230146f2…

MALICIOUS

PDF

35.1 KB Created: 2020-08-01 16:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c421f9326528a39001740b9a43ec052e SHA-1: 4a61159c4832ef74b99151c72b0d7c991e026d84 SHA-256: d286fce7230146f29a8ec849d4bf63dbdf76f784c0a006d514b70c19a84ed76f
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, including a known malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=call+uncle+bob. The document body contains garbled text but also includes the same malicious URL, suggesting it is the intended lure.

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=call+uncle+bob
    • http://files.karlamoralesphoto.com/uploads/1/3/1/4/131452935/6469711.pdf
    • http://files.sunwestsportswear.com/uploads/1/3/1/4/131453215/8701036.pdf
    • http://files.ultimatwiremachines.com/uploads/1/3/0/7/130776120/pexapokigitez-tudemeveli.pdf
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/pimedezejifosokekotitida.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/nepudadokonapuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/zojaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/94854679917.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/67372814497.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/43310261407.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/81839868416.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5554/files/gikevigezufujiwetije.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7436/files/77601139313.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/98869956481.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/21120004497.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xamunodobesezuwenetubaf.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_off00004e52.bin
95baafdce2423ea27e65af3387f6daa3b5c0410b59c1f070b4b5f84edae55c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E52 4564 bytes
font_01_sfnt_off00005de8.bin
93a55dadd2fc5367af7aefe80ddf234bb33775c508731ff88be16e794ea9c228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE8 10100 bytes

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