Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b114cabf24d4043…

MALICIOUS

PDF

53.1 KB Created: 2020-08-26 17:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9971c103197496fad8365719dca17714 SHA-1: 75c081e2e1fb16b8cb53d08a4b0939eacf36fdf6 SHA-256: 1b114cabf24d404397aa263d0fc83345dc6c79eba6a96527257cead36066d173
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to edible plants in Texas. The document also functions as a link farm, pointing to numerous PDFs hosted on Shopify, likely to improve search engine ranking and obscure the malicious intent. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

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=edible+plants+in+texas
    • http://togiliw.pocketwinemaker.com/uploads/1/3/0/8/130813366/3dda792.pdf
    • http://puzego.noswfoundation.org/uploads/1/3/1/4/131453723/2235206.pdf
    • https://cdn.shopify.com/s/files/1/0430/9870/1977/files/anticresis_en_peru.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/42656205180.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/basedarinetisewasopakajam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/51838785203.pdf
    • https://cdn.shopify.com/s/files/1/0437/8099/7269/files/zegagejoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/4693/4430/files/namavixemopiwinosin.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/electrician_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0440/6060/6616/files/basic_business_statistics_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1676/files/oxford_university_press_pakistan_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/everfi_financial_literacy_answers_higher_education.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_off00009390.bin
216f53be81245988d9553a1bf069c87cbb4a02fbc3396aacc678637f3cebfbc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9390 5020 bytes
font_01_sfnt_off0000a4b6.bin
e0a0015371590106cd07fb83b7d993ad710ba98ac8e62a272dc5527b47ee831c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B6 10372 bytes

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