Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef16e7f02485a680…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 20:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02cf37cf454c0c6c4c0dfeffa1de91ac SHA-1: 116bffa955abde20e8ef7f89bef6d89754834c6b SHA-256: ef16e7f02485a680ace319a6a637ae262ec4d0a2e2315133e516781cef0548be
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=apache+tomcat++for+ubuntu+64+bit'. It also exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0430/8844/5604/files/xafamorelozizesorumonu.pdf'. The document body, though partially corrupted, contains text related to 'Apache tomcat for ubuntu 64 bit', suggesting a lure for technical users. The ML classifier strongly flagged this PDF as malicious.

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=apache+tomcat++for+ubuntu+64+bit
    • http://files.novaprint.com.sg/uploads/1/3/1/1/131164252/e65816824aa3c7.pdf
    • http://files.niagaracentrendp.ca/uploads/1/3/1/8/131871659/xolewotizamukin.pdf
    • http://files.shotarchives.com/uploads/1/3/1/3/131383247/8922855.pdf
    • http://files.wattpat.co.uk/uploads/1/3/0/7/130740255/5161892.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/xafamorelozizesorumonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/ngi_xa_l_albert_camus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6746/4085/files/varicocele_medigraphic.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/artificial_intelligence_with_python_prateek_joshi_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/xavexojutexexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/bismillah_khan_shehnai_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/nelinu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0779/3561/files/sixetebaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/32928569797.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_off00006539.bin
5ded4a45a056c168de5586717aa751f2e84601db08d82282209ce48c3f500a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 5416 bytes
font_01_sfnt_off00007783.bin
c791723fbdd2a93e4d5fcb502b9f81dcccf8c24b7c9c135b11d5054fb71b77bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7783 16092 bytes

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