Malicious PDF — malware analysis report

Static analysis result for SHA-256 2942e90cd0b074ad…

MALICIOUS

PDF

44.5 KB Created: 2020-07-30 08:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b71bb5b6a4872bd47b63f82d7321c8 SHA-1: e51e1783150cecf46070258a8eb02c2d0c9d0288 SHA-256: 2942e90cd0b074ad90ef5a7e4b8a6e99981dadba1f4a30463f72239a080e292d
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.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, suggests a lure related to 'technical drawing objective questions pdf'. The presence of a link farm with numerous external PDF links further supports a malicious intent to drive traffic to external 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.cc/pify?keyword=technical+drawing+objective+questions+pdf
    • http://files.sallysvalleykennels.com/uploads/1/3/2/6/132681316/jokupuw_besikevure_mejifitaxizikaj_zebisom.pdf
    • http://files.brandygwen.com/uploads/1/3/1/8/131856285/80aef72001.pdf
    • http://files.divacare.co.uk/uploads/1/3/1/3/131378990/2822969.pdf
    • http://files.centrocha.org/uploads/1/3/0/8/130873870/7918256.pdf
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/24542111432.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6854/files/dutujoxakokemesevubakewa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/pinuton.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/67422768258.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/28181766595.pdf
    • https://cdn.shopify.com/s/files/1/0434/8225/1421/files/vaxisanupisurowemug.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/4592053086.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/2457470430.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/88494618119.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/lufibaj.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/
    • https://cdn.shopify.com/s/files/1/0428/95

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e6b.bin
f43322ab97cac7f7c4b46ab56d7142eed12c248f637bcd2b85f246ebfa728b2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6B 5744 bytes
font_01_sfnt_off000081ed.bin
23a01df3afd495a5bfcbeece1fb9d8696014cc5ec893a89a49b35c30d8c91c10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81ED 10296 bytes

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