Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca83d8e5adc3ad98…

MALICIOUS

PDF

49.2 KB Created: 2020-07-27 20:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c47b056db2a8c6b80f9a522b5297f13c SHA-1: 28c52db43302edd72a8a170524612f9330d2fd1c SHA-256: ca83d8e5adc3ad98ec2629f47122c18fd9e96ba2ca18fe137b60da47f65605ac
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, appears to be a lure related to 'best casual android games 2018'. The primary heuristic firing indicates that the PDF links to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt.

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.cc/pify?keyword=best+casual+android+games+2018
    • http://files.eguastella.com/uploads/1/3/1/8/131871690/4656610.pdf
    • http://files.lafortuneracecars.com/uploads/1/3/0/7/130776262/8397540.pdf
    • http://files.loveandmercyfdc.com/uploads/1/3/1/8/131857071/tazowirujuvimi.pdf
    • http://files.wilcoprevention.org/uploads/1/3/1/4/131437740/29b296.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/tejal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/93488049885.pdf
    • https://cdn.shopify.com/s/files/1/0433/8476/6620/files/kamufeweferukukudobitine.pdf
    • https://cdn.shopify.com/s/files/1/0440/4638/5317/files/61765476283.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2245/files/271368886.pdf
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/ratoxupozaxanes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/54615458179.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/26693168294.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamefidijuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/mawipono.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84511803825.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rokagarunawawutasa.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_off00008028.bin
cf6fa93ce565fcaeff45a61aca5470fdd17ea8a2c93583d8192d6615b8880cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8028 5708 bytes
font_01_sfnt_off0000936a.bin
ec910190c22e5175c50a9df4d1da54ee11e869f24e82b75c2b1743c1601ad6c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x936A 10484 bytes

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