Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18624b78d1e79e6…

MALICIOUS

PDF

45.8 KB Created: 2020-08-17 16:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7684fd6ffe86fec741cd3682641e6bf6 SHA-1: f6a71d88b9ae05e05a868db6f9b7a7ab34e527ac SHA-256: a18624b78d1e79e6ccca7d9832f747db828f4991600012cd9bcc4227bdcc95b4
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com. This domain is used as a redirector, likely to deliver a secondary payload. The document body, though heavily obfuscated, contains the text 'Pros of school uniforms statistics' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a large number of embedded links to Shopify domains, which are likely part of a link farm to improve SEO for the malicious redirector.

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=pros+of+school+uniforms+statistics
    • http://files.rachelthomsonstudio.co.uk/uploads/1/3/1/4/131454603/wewofim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6370/files/fovuginiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/3365/5446/files/fopuvugedaxokeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/kubudutizexij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/28078206710.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/vaikom_muhammad_basheer_stories_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/3606374521.pdf
    • https://cdn.shopify.com/s/files/1/0433/3276/3801/files/8866807272.pdf
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/fundamentals_of_engineering_economics_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7740/files/wobivukalazetusunomomoz.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_off0000767f.bin
090b596e047d7fb36e69c473ba851704849d691954de83c76775b1f48865a900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 5124 bytes
font_01_sfnt_off000087b4.bin
03dce93b878bdee4af237d09088431e4aaf9cfb5eee13185b7b87b71bb54a712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B4 10264 bytes

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