Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41662a418a9d549…

MALICIOUS

PDF

41.7 KB Created: 2020-08-02 00:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85c9ef2da9c9e996d30e8d3c41842877 SHA-1: f55a7b8003381221c14ba4c58c3073ed2faeaf5b SHA-256: e41662a418a9d549f0e3a8284f9974bc4840e9f3787a68e38175eff3ab3c379f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to domains that host further PDF files, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=shunting+yard+algorithm+python'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=shunting+yard+algorithm+python
    • http://files.whs12885.org/uploads/1/3/1/4/131409017/d3802dd9.pdf
    • http://files.green-neighbour.com/uploads/1/3/2/7/132740763/sogejikevade.pdf
    • http://files.globalisationandcities.com/uploads/1/3/1/6/131607174/jilaxafufusekiw.pdf
    • http://files.truedietitian.com/uploads/1/3/1/4/131483217/tijunuso-rizuvonutajut-gowedaju.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/judajated.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/10060026676.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/69988026237.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/xifinuziz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/dugokipinibafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/96593952692.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/nilesabafodawoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/61296602568.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/fulasasavosidotaxuvisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/special_occasion_speeches.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/28249060813.pdf
    • https://cdn.shopify.com/s/files/1/0432/3999/7595/files/79385090451.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_off0000652d.bin
95bcdda643398038739fdc1f8cdb68e447827c37ec184e3a2b293e536051ddcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 5400 bytes
font_01_sfnt_off00007766.bin
ec005c84ae85dce0eded1d000eea9e9e4a364e8ceec06cce73c7ee5942345595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 10012 bytes

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