Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a67127020a40040…

MALICIOUS

PDF

51.0 KB Created: 2020-08-11 07:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b384e2ccd5d7f10eaa71996a8274bf48 SHA-1: 613fdd2770cbdb79bad1a73cd2ec3c2e2d30ad34 SHA-256: 4a67127020a40040535f895799723639947a373e1b37593a66926227c50750f6
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.com. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious content. The ML classifier strongly flagged this PDF as malicious.

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=framingham+risk+assessment+tool+pdf
    • http://files.samantharamsay.com/uploads/1/3/1/0/131070173/kefenisefamero.pdf
    • http://files.lunaleathers.com/uploads/1/3/1/1/131164574/aa78956.pdf
    • http://files.jubileepainting.com/uploads/1/3/0/7/130738852/larup_vinilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/822812214.pdf
    • https://cdn.shopify.com/s/files/1/0436/9298/2427/files/25276685054.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2752/files/b_p_lathi_signals_and_systems.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/keto_diet_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/lufibefojelimokipuxav.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/43776479406.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/rogilugigod.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/xevakutupupuxalep.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1972/files/tusajogozuwiwijufufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/mifufepidefev.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/kadogodu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/vimolofonuborologa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/bourbaki_theory_of_sets.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_off0000895a.bin
c00933321aead8597a34f5057b8cb454cb881760d94e872babc2d3800df19884		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895A 5472 bytes
font_01_sfnt_off00009bc5.bin
ecb61fee523514cb5f378c1f751684c94c9dfa109bfa4e9da7645da6c26fc9d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC5 10240 bytes

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