Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3931ce62e2d4f23…

MALICIOUS

PDF

42.3 KB Created: 2020-08-09 17:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b88808b4843dd8758bb640118ab7cbfb SHA-1: fdf3d1350f4e436730ca820097a908b486cbf3fb SHA-256: c3931ce62e2d4f2373464548e5369b78a5ed39636e7e85b421f0c7ab2242c6b3
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.com, disguised as a link to a data analysis PDF. The document body itself is heavily obfuscated but contains the same lure text and the malicious URL. The presence of numerous other links to PDFs hosted on various domains suggests a link farm or SEO poisoning attempt to increase visibility and click-through rates to the malicious content. The ML classifier strongly supports the malicious verdict.

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=data+analysis+and+interpretation+in+qualitative+research+pdf
    • http://files.fsasuffolk.org.uk/uploads/1/3/2/8/132814024/sokabimizerixu.pdf
    • http://files.royalecare-afc.com/uploads/1/3/1/4/131407284/xetodajadobima.pdf
    • http://files.tyreplug.com/uploads/1/3/1/8/131871518/4897a20ae.pdf
    • http://files.mvcbvc.com/uploads/1/3/0/7/130739155/taxujereli_lajudi_kutanaronu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/word_one_page_landscape.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2785/files/im_bringing_sexy_back_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/tutebumup.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/39176364504.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6301/files/searchs_php.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/gupetisizozadajepedeki.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/doxikek.pdf
    • https://cdn.shopify.com/s/files/1/0431/7088/9892/files/pasunorufevalafo.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_off000066e2.bin
8c1eedc4d2c55aa6dcc6c6ad9714a164d059fe7dedd8dbd8884d4e0bf2c6e713		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E2 5532 bytes
font_01_sfnt_off000079c0.bin
026d7f35dc8024be0ac1352be9d7c9c62fbd893460155837eb814b93e79858ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 10116 bytes

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