Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62f2922bca24cb8…

MALICIOUS

PDF

40.1 KB Created: 2020-08-30 22:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0139e60e99b34b9f7715e25a6990a511 SHA-1: d3c38638367cd5d727b6e66c846b74f895664eaa SHA-256: b62f2922bca24cb8ea03021563c2b64c1acb23f8411b2287a3249bc46bbfbfee
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, with the first one being to 'cdn.shopify.com'. The ML classifier also flagged this PDF with high confidence. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a malicious site.

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/wix?keyword=th%2525C3%2525A9orie+de+la+classe+de+loisir+pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1925/files/sinozez.pdf
    • https://cdn.shopify.com/s/files/1/0462/3925/2631/files/teamviewer_portable_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/5566/8639/files/concrete_poem_template_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/explain_search_engine.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6296/files/68963752429.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/84310254017.pdf
    • https://cdn.shopify.com/s/files/1/0459/9185/4239/files/i_write_sins_not_tragedies_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/0684/3288/files/xuginunobizivalobegaxod.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/84136044753.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/wutukomew.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_off00005a47.bin
2a0f1c07ca172fa4a4af52b4f765b08673d5eea5ad9039cdf1cbe47766ac386b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A47 5336 bytes
font_01_sfnt_off00006c19.bin
b5e318f6ca21b595411c099b61f9112272d113c9d6d1e95689ca369f906525f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C19 12060 bytes

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