Malicious PDF — malware analysis report

Static analysis result for SHA-256 236a4184cb9314c4…

MALICIOUS

PDF

60.4 KB Created: 2020-08-11 14:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 572fbea9a4fb8230a1c137dc88b582d2 SHA-1: 75426a961b75436924f6c495cf53ad8198178249 SHA-256: 236a4184cb9314c4ba2c57d29f9d27d453b911772cc43dca4108470c5336378f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Cain and abel story pdf' and the malicious URL, suggesting a lure. The file also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on shopify.com, likely to improve search engine ranking for 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=cain+and+abel+story+pdf
    • http://files.koreanatoledo.com/uploads/1/3/0/7/130775062/8099132.pdf
    • http://files.andrewcollinsart.com/uploads/1/3/0/8/130873941/noviwe.pdf
    • http://files.disneychristmasparty.com/uploads/1/3/1/0/131070894/zakidutimirixer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/55364399747.pdf
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/65679919310.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/misulizamapin.pdf
    • https://cdn.shopify.com/s/files/1/0437/0114/1657/files/air_ticket_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/75239217653.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/pokimalifuworobelugedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/42067613353.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/bikomakivinudox.pdf
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/wirazidalotujujafemarawoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000cc57.bin
4104512829e79b0bf56edfd7c2d5b1eff3efb118d2d3663921440964c23bc63b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCC57 16980 bytes
font_00_sfnt_off00008cd1.bin
adf2bdfe7c49d50730870f231f439a9557e7a2991de341a43de51a3c820c16f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD1 5184 bytes
font_01_sfnt_off00009e7b.bin
80ccfbb5c2021382078132c809d4424469b8efe200219067f923be0bf8e27797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7B 13836 bytes

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