Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfdd21a2fe460cf…

MALICIOUS

PDF

44.9 KB Created: 2020-08-25 16:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa82c1d1f61262e50483c41f796a2a49 SHA-1: 8a037663c6dc6b2f6877164485fb072fcf66b9b0 SHA-256: ccfdd21a2fe460cf9d9be0de7b27242079c8fe200309ef9de2042c7503617dce
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body contains a title related to 'lol support item guide' and the authoring application is wkhtmltopdf, suggesting it might be part of a link farm or SEO manipulation scheme. The presence of numerous Shopify URLs, while many are benign, could be used to host malicious content or as part of a broader distribution network.

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.ru/pify?keyword=lol+support+item+guide
    • http://files.westernwc.info/uploads/1/3/0/9/130969300/9471533.pdf
    • http://nijasim.realpeoplemedia.org/uploads/1/3/1/8/131857315/9182720.pdf
    • http://files.tionalee.com/uploads/1/3/1/4/131437318/90ba44f7.pdf
    • http://files.ahzusamoyeds.com/uploads/1/3/0/9/130969728/2936508.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/zugimeguxabosusomeju.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/11956504615.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6161/files/berliner_platz_2_neu_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/91406197236.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/zefifi.pdf
    • https://cdn.shopify.com/s/files/1/0462/5534/1717/files/javascript_array_find_performance.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/jafumon.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/70446321087.pdf
    • https://cdn.shopify.com/s/files/1/0452/3973/0336/files/x96_mini_android_tv_box_dstv_now.pdf
    • https://cdn.shopify.com/s/files/1/0440/7423/8102/files/4259261214.pdf
    • https://cdn.shopify.com/s/files/1/0430/8860/9429/files/91633084765.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_off000072c6.bin
a80cc04e9f0110eb5d01b6aaaaf3e673db3c3e8c49f3437ef81258680ba2fc06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C6 5008 bytes
font_01_sfnt_off000083bc.bin
be4188715a4c8eed35824fd3c70a33461fe7f4ea2039892204226595a909d802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83BC 10100 bytes

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