Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17722c21b235cff…

MALICIOUS

PDF

44.4 KB Created: 2020-07-28 00:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac61f3d5bd6219ac9ca5ec866f654d57 SHA-1: 1114f14ada8d509f6ac52c74f6b0e2ca88d59be3 SHA-256: b17722c21b235cffb690c1fc50871ae84938ab33c6aa09f57ef9b4ed1cfb53e9
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a piano sheet music maker. The document also functions as a link farm, directing users to numerous other PDFs hosted on Shopify. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection 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.ru/pify?keyword=piano+sheet+music+maker+free+online
    • http://files.olenkaschoolofmusic.com/uploads/1/3/1/0/131070829/3235715.pdf
    • http://files.bengrayzel.com/uploads/1/3/1/6/131606694/114e4aa39b5.pdf
    • http://files.escalation.com.au/uploads/1/3/0/7/130739427/e4867.pdf
    • http://files.apriest.com.au/uploads/1/3/2/6/132696263/daxapus_rafaxumek_jimepabilozos_tuwavamataxodow.pdf
    • http://files.artandroulla.com/uploads/1/3/1/3/131380773/6e51b943ebb202b.pdf
    • http://files.ar
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mukevomisuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/5585/7315/files/26177603931.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/fetogujozotom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/43633703652.pdf
    • https://cdn.shopify.com/s/files/1/0428/7361/8599/files/78025978027.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/29209220271.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pijajaza.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/mudujawudefusomeletamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/bulelusig.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9171/files/gemuwaramaramawudeli.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_off00006ea7.bin
3f58821a5915430c5d3e341dc18b5f5026515640f12ccfcbecc868ed60b82b79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA7 5068 bytes
font_01_sfnt_off00007fb0.bin
3732da9fa920473f53d3c5a615e57b8ab783ac252de5527be6090434da26ed79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB0 10864 bytes

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