Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe83dee6cbe68f1…

MALICIOUS

PDF

37.6 KB Created: 2020-08-19 17:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c212dcd1b21bacedecbd026e890ef728 SHA-1: dfe8d1dc6c5f968c2ee395c4a9ea0a32fd30c8d8 SHA-256: ebe83dee6cbe68f1cad94791079d5a66078f664ae2c142817c85027bff5efe11
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results, specifically for 'cbse result 2015 class 10 marksheet'. The primary malicious URL, https://ttraff.ru/pify?keyword=cbse+result+2015+class+10+marksheet, is identified as a malicious redirector. The document's structure and embedded links suggest a social engineering tactic to drive traffic to potentially harmful 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=cbse+result+2015+class+10+marksheet
    • http://files.vonsmartexercise.com/uploads/1/3/2/7/132740361/d4d93eb8b44af1.pdf
    • http://pebukuf.touchingchi.com/uploads/1/3/1/8/131857054/4901582.pdf
    • http://neradodo.themoneyrun.org/uploads/1/3/0/7/130740387/9796322.pdf
    • http://nujerupa.seedsforchangeconsulting.com/uploads/1/3/0/7/130776485/7760246.pdf
    • https://cdn.shopify.com/s/files/1/0445/3338/3332/files/kaprekar_s_constant.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5916/6888/files/medical_dictionary_english_arabic.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/44936548823.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/kudalawafixapapizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/20029062646.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6599/files/addis_ababa_population.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/taxivukewutisipotujudim.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1458/files/xiwupetulodepajimajiti.pdf
    • https://cdn.shopify.com/s/files/1/0429/3653/3151/files/bupopuzunodijevobebimopix.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/tepam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/30779824145.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_off0000538f.bin
bd74488323dff89638a39a6f6ebf74f8c73b5487216f3b2b22a4dadd02b2fa2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x538F 5600 bytes
font_01_sfnt_off0000667a.bin
5ce91a93c8579bfb28c20e410836a8d136b78f7a23afd3d38b207e61cb92478f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 10264 bytes

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