Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3a21785274a341…

MALICIOUS

PDF

43.8 KB Created: 2020-08-18 16:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94f539419e7b129e4ddf4ee86bb67d35 SHA-1: 6d7c535004e17b8c644b1866af89e9be1a164b7e SHA-256: ae3a21785274a3410a3eeb8767dad9c611827a78a689ad17f0ab1e32995d25c4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, including a critical link to a known malicious redirector at https://ttraff.com/pify. The document body, though heavily obfuscated, contains text related to "Cause and effect essay worksheets" and the malicious URL, suggesting a lure to a phishing or malware distribution site. The file was generated by wkhtmltopdf, a tool often abused for creating malicious documents.

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=cause+and+effect+essay+worksheets
    • http://zebir.keep-rising.org/uploads/1/3/1/8/131857419/f152ed2d.pdf
    • http://files.pesync.com/uploads/1/3/0/7/130739782/zovozefe-zoduwipadapebug.pdf
    • http://files.yogashak.com/uploads/1/3/0/9/130969910/zevuru.pdf
    • http://files.gobo-projector.eu/uploads/1/3/1/3/131380467/bf12094b.pdf
    • https://cdn.shopify.com/s/files/1/0431/4811/6119/files/kedomuzobotigigamon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/93495408894.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/27126806328.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/28627010985.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/1422971304.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/61148902003.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/utsa_biology_degree_plan.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_off00006dea.bin
9948f59026d5cec35f7cce8dbfc901d0c61d27dcc75f073e989b0f2414830cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEA 5240 bytes
font_01_sfnt_off00007fcc.bin
edd8f4456fa9e77b71d57c9988d4ea53a7b47fec3b36e1b513f97ff164b67700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCC 10192 bytes

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