Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44b0951855fd11b…

MALICIOUS

PDF

43.6 KB Created: 2020-09-28 18:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02069872ae86b372ad5ffde03445ed21 SHA-1: 9744ffad692957d924f73abf9188e70f58ef4306 SHA-256: e44b0951855fd11b84e0036a7695cea81f7b60b60f7ab5daab906351b809dfe9
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirectors or known malicious infrastructure. The primary link identified, 'https://gettraff.ru/mozel?keyword=como+aprender+a+dibujar+pdf+gratis', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO-spam PDFs. The overall purpose appears to be to drive traffic to malicious sites through a link farm.

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://gettraff.ru/mozel?keyword=como+aprender+a+dibujar+pdf+gratis
    • http://files.kashmirweavers.org/uploads/1/3/2/6/132681863/kinorinuzafoko-tumesegako-zaleforajoteji.pdf
    • http://files.sshvug.com/uploads/1/3/1/6/131606256/8febbe.pdf
    • http://xisele.visionquestmusic.com/uploads/1/3/1/4/131407089/sifukisibagu_zavixekajujos.pdf
    • http://files.cristinaliomakeup.com/uploads/1/3/1/4/131453615/rebegamizegilawexoju.pdf
    • http://files.monumentalconcreteworks.com/uploads/1/3/0/8/130874598/xozitojigerun.pdf
    • https://site-1036621.mozfiles.com/files/1036621/32221490120.pdf
    • https://site-1037149.mozfiles.com/files/1037149/82765487719.pdf
    • https://site-1036805.mozfiles.com/files/1036805/nobakutili.pdf
    • http://files.our-redeemers.com/uploads/1/3/1/3/131383541/watifezobagiwided.pdf
    • http://files.ppat200.com/uploads/1/3/0/7/130776891/8429136.pdf
    • http://binalom.vinoetamicis.com/uploads/1/3/1/4/131406821/1425fc6c8d4.pdf
    • http://warigan.theauctionhousesg.com/uploads/1/3/0/9/130969265/wugiridimedad-mefili.pdf
    • https://5a82595f-488d-457b-823f-6d75c66fb2b1.filesusr.com/ugd/111c46_a0b68dee290a48d09c843a74c7436a8b.pdf?index=true
    • https://57c0f664-a84c-41ac-8f0d-2a9321fec392.filesusr.com/ugd/24d943_ab42b983e9724e1ea8efbe60056e6fe9.pdf?index=true
    • 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_off00006b9f.bin
b8f36d9eba2691e07977bac857182bc2b0ab42200af30ee2f567b81d69dc76da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9F 5448 bytes
font_01_sfnt_off00007e0c.bin
5d6d5b157cf32eaaea9143b1a08e48b9979abd6b2f9d7672e30aca78e47dc774		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0C 10888 bytes

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