Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29b5ef942837caf…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 11:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3471c76853a820565e9d530e988383b SHA-1: 81a7f5789684a2140a66beff08f1f6210c21e7fe SHA-256: a29b5ef942837caf1966eff6be57dbf7966a396a20e97737d743e04c12f05200
150 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, masquerading as an essay. One of the primary links directs to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the PDF structure and embedded links indicate 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.com/pify?keyword=best+day+of+my+life+essay+pdf
    • http://files.melbatheater.org/uploads/1/3/1/3/131380558/8207605.pdf
    • http://files.worldoutreachchristiancenter.net/uploads/1/3/1/6/131606198/dukabokumidal_zixorupagagajak_xijuvu_digukubijalanep.pdf
    • http://files.ulumaupuanui.org/uploads/1/3/0/9/130969169/gokekabupuporojiwepi.pdf
    • http://files.millennialbarbers.com/uploads/1/3/2/7/132740873/5594280.pdf
    • http://lanaxivuz.biglittlebrains.com/uploads/1/3/1/4/131406149/toforawew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/rutovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3651/6250/files/nuvovadapudevamipitavam.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/58683349920.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/68346578391.pdf
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/cover_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/8601811401.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/91178447309.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/46850554045.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/34543820643.pdf
    • https://cdn.shopify.com/s/files/1/0436/0385/3469/files/biduwikopitujelebudapu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/33318142128.pdf
    • https://cdn.shopify.com/s/files/1/0431/6849/7823/files/23098731206.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_off0000667a.bin
f6ccdc596ce9f5dd2dbbad0d23c98b2730fd954b7fd801461e84c703e2c745eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 5244 bytes
font_01_sfnt_off00007852.bin
575401e8118c324aab481307cc530bc9afa2aedf8dcb217958925a6c9bb330e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7852 9728 bytes

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