Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe793b8b87ae4900…

MALICIOUS

PDF

37.8 KB Created: 2020-08-23 13:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 036f1761001b9321462652b83ac8765b SHA-1: 68e84c3024a114129e1ae0bb8541a9e532f058ad SHA-256: fe793b8b87ae49007e2318c50f9b3c796aa27615e9e3ca53bbb32beee1a51aa1
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to worksheets and includes the malicious URL, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning attempt to distribute malicious 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=consonant+blends+in+sentences+worksheets
    • http://zamematir.tintawitaelderliving.com/uploads/1/3/0/8/130874038/8938673.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/riliruwowagoxosi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/sobaginozugatuze.pdf
    • https://cdn.shopify.com/s/files/1/0434/5603/7017/files/cinderella_2015_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0435/9444/9055/files/45990423846.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/91247855792.pdf
    • https://cdn.shopify.com/s/files/1/0436/1597/7630/files/nexefatojarib.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/magisterium_libros.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6467/files/mabejuranekuwazono.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.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_off000056d0.bin
0103de2104c6068da5a35f373ea1d41c8016348e4841d3b3498273d38ea59619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D0 5228 bytes
font_01_sfnt_off0000689b.bin
191ae5a06e84a4d2c37badf1e4c11072a4de94513ff5ee1313eadea8c0bd3458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689B 9932 bytes

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