Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad74e75286f0871…

MALICIOUS

PDF

41.4 KB Created: 2020-09-18 18:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed16768f32dc4f8ec6098e5724f459f8 SHA-1: 08ad1b75677df74f913963a30be7e69b0a2fcb61 SHA-256: dad74e75286f0871d2717c740d93cdf080d6a77b9cd6f14d941fc819d40d6324
130 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text suggesting a lure for 'free games', and the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to Shopify. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload or lead the user to a phishing site.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=free+games+unblocked+bullet+force
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/xatutasejapuxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/58033588229.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9603/files/98949488952.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/bekodoresifipabalu.pdf
    • https://abc4b075-af36-4731-8ddd-5def9ad9bf79.filesusr.com/ugd/a64c8c_dcde982e16db42f5a2378985cd968dbd.pdf?index=true
    • https://3706c88d-140c-4969-9337-8cdb5e48e206.filesusr.com/ugd/e6092c_f9d9f8c677ff48f4840eb5dbb2b41d62.pdf?index=true
    • https://4d2616e8-152d-4dde-a46a-d3d72c98fb27.filesusr.com/ugd/ef253e_3523da0023624c7e84e0e6870d639f79.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/jaduwudubasutov.pdf
    • https://cdn.shopify.com/s/files/1/0438/3024/7584/files/kozutopodijiwim.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/lebadojorobotorijupuk.pdf
    • https://cdn.shopify.com/s/files/1/0483/8916/1128/files/57933073469.pdf
    • https://cdn.shopify.com/s/files/1/0436/0696/6430/files/jack_frost.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_off00006437.bin
795d95904923e7d6f61eb5f5da52c3f155527ad02358e47782d1312cf4e49a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6437 5500 bytes
font_01_sfnt_off000076dd.bin
017987ea83abca227bc104661d82965c5c0f9235e48be71df5ba88d839ce4da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DD 9808 bytes

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