Malicious PDF — malware analysis report

Static analysis result for SHA-256 9157eb18b896376e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-23 09:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b966510892ab706ac9b05cbc08ba9c7e SHA-1: cc62cba4e99449711ac9d9ea8546c325f66e363d SHA-256: 9157eb18b896376eccf137f0e9134802a86e1d6a4d5d56fe65429118ffc146f3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=iimb+placement+report+2018', suggesting a lure related to a placement report. The presence of multiple PDF links and the ML classifier's high confidence indicate a malicious intent to redirect the user to harmful content.

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=iimb+placement+report+2018
    • http://kukuxomas.designsbydiblankets.com/uploads/1/3/0/7/130776716/887565.pdf
    • http://files.singaporelawngames.co/uploads/1/3/2/7/132740327/tefifatas.pdf
    • http://files.krissyoneill.com/uploads/1/3/0/7/130776656/e15b4bc8b.pdf
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/95832903922.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/xevekuvixibodonapomurana.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/cordless_weed_eater.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/52890551138.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/dotovasuxowatesovuzodegin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/tf2_brain_maggot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/valulisafajunivakajuki.pdf
    • https://cdn.shopify.com/s/files/1/0438/9175/3115/files/balanceamento_quimico_9_ano.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_off00005d57.bin
4f9dc4ab37c1181c39589848bd0eee1e3a29eaea98fe1a08d885467d07ec43c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D57 5496 bytes
font_01_sfnt_off00006fe1.bin
8a78e92f752523ce4bb9326d30b2a1e533df68dce72d7e2da24d7064b8f68858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE1 10116 bytes

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