Malicious PDF — malware analysis report

Static analysis result for SHA-256 36923787fc99c843…

MALICIOUS

PDF

31.8 KB Created: 2020-08-15 07:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ba75ccb49ebc64962d89576d9348a52 SHA-1: 21b5344bd383dc7ffcbc1b8fecd21a01a191cb1a SHA-256: 36923787fc99c84370e4ffe48a6bd21a13f6c4154493a9334176a16580d19a37
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=arabya+rajani+book+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, also contains the same malicious URL. This suggests the primary intent is to redirect users to malicious content.

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=arabya+rajani+book+pdf
    • http://files.wadsworthevolab.com/uploads/1/3/1/6/131607522/pufofebo.pdf
    • http://fiferidi.longford.coralleisure.ie/uploads/1/3/0/8/130874254/vegozusimozume_givuxewalan_jenalatubelenaf_pukefut.pdf
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/82203006448.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1813/files/osrs_construction_calc.pdf
    • https://cdn.shopify.com/s/files/1/0429/4282/4611/files/94265517425.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/breckenridge_snow_report_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/buleko.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/naxilovik.pdf
    • https://cdn.shopify.com/s/files/1/0431/8819/1394/files/39546749299.pdf
    • https://cdn.shopify.com/s/files/1/0448/0620/9702/files/87527651997.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_off00003f20.bin
ef02c81b131ff118cc9eb325c4b7b416f73ff2cf7e35ecd5c9c4b5db97d04927		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F20 5196 bytes
font_01_sfnt_off000050e6.bin
e7a9c3302409a1e7d5eb09283ccd8df9c19acb2ad10645baf02fc7e8799dff59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E6 9888 bytes

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