Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89504a192a02853…

MALICIOUS

PDF

56.8 KB Created: 2020-08-07 21:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfb887ae50885d4afb4ca5edac60d01a SHA-1: 1a469aa30373bef38a80c570fe0193d41c43368e SHA-256: a89504a192a02853e3cbd4b169977a13d6391b6c6e4192ada3c1cd357359f740
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-optimized lures pointing to PDF files. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same redirector URL, confirming its malicious intent. 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=accounting+auditing+and+governance+standards+for+islamic+financial+institutions+pdf
    • http://files.tearsofglass.ca/uploads/1/3/2/6/132681026/7555492.pdf
    • http://files.jdstackroom.com/uploads/1/3/2/6/132681985/xuxukane.pdf
    • http://files.klsings.com/uploads/1/3/1/1/131163590/7524928.pdf
    • http://files.donthesitate.org/uploads/1/3/1/3/131383838/jewojevasixase-wobidikudomap-bajomizet-fiwogemus.pdf
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/xibox.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/61148432158.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/mitosis_and_meiosis_assignment.pdf
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/62244864277.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/xivijatejidajifijogiked.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/72964142455.pdf
    • https://cdn.shopify.com/s/files/1/0450/7402/2550/files/practically_speaking_rothwell_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/rawibozujuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/gigemudo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/luvatikitidalufubiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/lirazolukekolexosixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/88220731665.pdf
    • https://cdn.shopify.com/s/files/1/0434/2228/5976/files/66958420245.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_off00007331.bin
628e0a9e3eb4e1dca0b6805f6525a85bc396dd71aaa52c2d8a23a783210cf3b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 5408 bytes
font_01_sfnt_off00008582.bin
91c929a344bf37cbc9d34dfd55b9845fdbd98f51cbede0521883858b750d0da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8582 10260 bytes
font_02_sfnt_off0000a8d3.bin
f97226bec82f24547cf80e5b813ad3758be7c69320011c0fe06122f931dd21c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D3 18800 bytes
font_03_sfnt_off0000c61d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC61D 4324 bytes

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