Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24467cfea0659b4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 20:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d89ac7dd1864f23cf0ca661d3bf2ffa SHA-1: 6248e018fe4db8ef57e91458b68ed9d34bb08234 SHA-256: e24467cfea0659b4bfdce11784b23bff30605a89cf2030e264294a76b358803d
128 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 disguised as an 'upsee exam form 2020'. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or traffic generation. The presence of a visual download button further supports a lure-based attack. No scripts were extracted from this sample.

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.com/pify?keyword=upsee+exam+form+2020
    • http://files.dsppsu.com/uploads/1/3/1/8/131872238/6978050.pdf
    • http://sojafev.cos-medics.com/uploads/1/3/0/8/130813115/931418.pdf
    • http://files.euroconferences.org/uploads/1/3/1/3/131380773/fupuxomejo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/28693431706.pdf
    • https://cdn.shopify.com/s/files/1/0428/9921/0407/files/lozizifosawemafom.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2741/files/720p_vs_1080i.pdf
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/97219988312.pdf
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/60954874400.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/allergic_rhinitis_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/93476882325.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/52836601929.pdf
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/jovigerejapenubozejoda.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_off00006568.bin
8bdb53690ca7380c578e1819c198263f192d3a65eef9d717ed59bbd8556d59cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 5348 bytes
font_01_sfnt_off00007786.bin
a4e716a909c0bcbab972f9e66d5d42f67a3d5d3b9458e232c379ac6cbca6a49e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7786 10540 bytes

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