Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11e1782c4e5d9fa…

MALICIOUS

PDF

41.5 KB Created: 2020-08-05 08:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e0f86203bfcdab01fb24ccd57c8fcda SHA-1: d0acb11cd7baa7ed8a595f2048ac934e3fc00ac3 SHA-256: b11e1782c4e5d9faf9c2135bf18d710d0a5e3e0f95cad7f58043a82412be58c8
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, disguised as a document about relaxation techniques. This suggests a phishing or social engineering attack. The PDF also functions as a link farm, pointing to numerous other PDFs hosted on various domains, likely to improve search engine ranking and distribute 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.cc/pify?keyword=pressure+points+on+the+human+body+for+relaxation+pdf
    • http://files.arttrails.org/uploads/1/3/0/7/130775292/bamimugizexuweg.pdf
    • http://files.jamiegellingsmediablog.com/uploads/1/3/1/3/131380052/faxesudujogidupebif.pdf
    • http://files.modpotsandplants.com/uploads/1/3/2/6/132682564/f30a18b.pdf
    • http://gefawu.whynautical.com/uploads/1/3/1/6/131606552/wijesuse.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/5923823404.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/dinulano.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/59214167694.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49470024852.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3669/files/89178268708.pdf
    • https://cdn.shopify.com/s/files/1/0430/8392/3609/files/bunurusizafesitikixup.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/factorial_program_in_scheme.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/3gp_hindi_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3396/files/38807275837.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/jidovemogagaxaput.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/64103653926.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/murray_42_riding_mower_manual.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_off0000638e.bin
7dcff5806a9952111e590af215cdf158fe374707dad1f781a8a1f46eaf76e666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 5592 bytes
font_01_sfnt_off0000766d.bin
f6aaa669d1c02fb1b0cd232ce9175478915e6af155d0f25ee50b64195028c50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766D 10072 bytes

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