Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6399c681ec60145…

MALICIOUS

PDF

71.5 KB Created: 2020-08-12 03:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a452457fd2b5abc6f7aa001f6d7a0ac7 SHA-1: 09b2d5bbcebdc95bba18be8e046b7d4d9e9193b5 SHA-256: f6399c681ec601459f13b7f05bc4022ba73941379be88e9021ff7bfcfd195dc8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=aditya+hrudayam+stotram+in+marathi+pdf', is identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text but includes the malicious URL, suggesting a lure to a malicious site.

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=aditya+hrudayam+stotram+in+marathi+pdf
    • http://files.bethinkcreate.com/uploads/1/3/2/7/132740218/70bd1ff781.pdf
    • http://files.hirechase.com/uploads/1/3/1/3/131381376/tuligemasetajeretod.pdf
    • http://files.trinicrew.net/uploads/1/3/0/8/130874567/mamoletiwaxuk-jamaxiwepesow.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/95582968752.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/fijevegut.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/gowilazagaxosuna.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/larval_form_of_echinodermata.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/brother_dcp_l2540dw_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0438/6573/5328/files/89856906633.pdf
    • https://cdn.shopify.com/s/files/1/0434/7173/2889/files/27377712364.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/nivoropiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/maposodilalojobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3805/6354/files/13913598465.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5069/files/salifonotasose.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/zilowopavilufadusumado.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/xokaba.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a626.bin
43c6fbb67b8b7d103365a2ba9a1563da9619c6d01e8bb55b520d5d9393f8bd8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA626 5340 bytes
font_01_sfnt_off0000b834.bin
9f9735dfffc8c011bc9e8ef237ff2436957f0c37a3f9eed5660ee2153b6c9474		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB834 3772 bytes
font_02_sfnt_off0000c3d9.bin
80ecdfd21a12d275804276a559497ebf53674e51e01e282c9c33b16d6c66aa57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D9 11708 bytes
font_03_sfnt_off0000e87a.bin
7961fd856c574d4efbc4ccb38da4a2926c5e1c39d0fc0721b5e73434740c856f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 13100 bytes

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