Malicious PDF — malware analysis report

Static analysis result for SHA-256 4195ef8afb42b776…

MALICIOUS

PDF

34.7 KB Created: 2020-09-03 17:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7939ccbd3c0f2f1da31e76bec3970d50 SHA-1: 4c315e4d6ed5ad01a5054d9f0508fc393fc61264 SHA-256: 4195ef8afb42b776eca4f643867419bf9a76e4fcbda9753f752ac89bd4e61f97
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.me, disguised as a 'functional skills maths revision guide'. This indicates a phishing or scam attempt. The PDF also contains a large number of external links, many pointing to Shopify, which is characteristic of link farm or SEO poisoning tactics to improve search engine ranking for malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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.me/pify?keyword=functional+skills+maths+revision+guide
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/70013105665.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/29445184888.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/isaac_asimov_ignorance.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/administration_of_criminal_justice_law_lagos_state.pdf
    • https://static.usrfiles.com/ugd/e2c250_1b12550d08ed4a019facc0b240e52aee.pdf
    • https://static.usrfiles.com/ugd/b8c837_d83da753361544a79b60b27f58f047da.pdf
    • https://static.usrfiles.com/ugd/37987b_7f2e64f70d3e40f48ee8096d2f9c6fb8.pdf
    • https://static.usrfiles.com/ugd/3aee12_c437e4e33bb041c591ab0c4598aab06c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e529965e6e147beb781697430368693.pdf
    • https://static.usrfiles.com/ugd/4d400c_0ff4f14380a748aea49778cd672ac727.pdf
    • https://cdn.shopify.com/s/files/1/0433/4341/3407/files/bodycon_dress_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/75824488448.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/xawinipefakuxepa.pdf
    • https://cdn.shopify.com/s/files/1/0461/9255/8231/files/80175749708.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_off00004a78.bin
121e735cfe4657c444eb64c393612352265fd897aa544dfefee458a03abef4f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A78 5432 bytes
font_01_sfnt_off00005cd0.bin
97c47aeaf9b7551a709e16136bc7f67fd5fca74d686c7ddd645b43ab043f0c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD0 9744 bytes

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