Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5d6f8c73622ff5…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 15:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd84dc0808c32ac0d3f698aa4aa645ea SHA-1: 475922afea34de99a086a4353ad1ce7786527ac5 SHA-256: 9a5d6f8c73622ff5a253f2655347a57f7c10f89f1994e31a471005b33733abed
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references to a 'school uniform shop', suggesting a social engineering lure. The PDF also hosts a large number of external links, many pointing to shopify.com, which is characteristic of SEO link farm techniques used to improve search engine ranking for malicious sites.

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.com/pify?keyword=aldridge+school+uniform+shop
    • https://cdn.shopify.com/s/files/1/0434/6137/8212/files/alcalosis_metabolica.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/fibonazikafolidafe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/86046159200.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/appsheet_multiple_select.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4cd4a99ce9947058e2eb2281cb292c3.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_a9cc6208556e454ea46936ec4f891fc7.pdf
    • https://static.usrfiles.com/ugd/7a11b0_88ed8340d7d84189be0ff26a797f2611.pdf
    • https://static.usrfiles.com/ugd/d54300_396f4c3e8fae49d8bdd23b6c5109f783.pdf
    • https://static.usrfiles.com/ugd/b8c837_10264304e69748139e3c82806221c35e.pdf
    • https://static.usrfiles.com/ugd/4c1554_caa7df3a88c84202984ad4586dd333a4.pdf
    • https://static.usrfiles.com/ugd/9eb187_80a8efa68b844b68a91c1bea703d2d59.pdf
    • https://static.usrfiles.com/ugd/05301a_c8c523100d2b4e528b0d50c22266ad00.pdf
    • https://cdn.shopify.com/s/files/1/0460/4008/8740/files/bomaxedosorosadur.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/bloom_s_taxonomy_of_learning.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8642/files/25584200787.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_off00005e1e.bin
e1c7a43f03fb433ccf61fe7ad6fdd3ddb4ba166fbb8d6173045465f8d60670e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 5348 bytes
font_01_sfnt_off0000702e.bin
e34d176d5e214fbedc84fead3f318a04a5b6b48e26ba7d3a752f2141b41e6578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702E 10148 bytes

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