Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed6afcf159e141c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 04:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a5cdb4c85f5f05c11e540686e775f78 SHA-1: 85f6697a764d888df8c1d5edfa8055c7c1381ef9 SHA-256: 1ed6afcf159e141c3241fde051e6eb25f1bffd7f2c5c409180f86cdf5e41d573
160 Risk Score

Malware Insights

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

The PDF contains a lure suggesting the user needs to install a browser extension or update to view content. It embeds a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious sites. The document also contains a large number of links to external PDFs, many hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning tactic.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wix?keyword=canadian+citizenship+study+questions+answers+2019
    • https://static.usrfiles.com/ugd/e32576_a0f24775b8064a088cfec98b3224d3e7.pdf
    • https://static.usrfiles.com/ugd/565485_b05911833a0d43feaa2cf7f537f2b191.pdf
    • https://static.usrfiles.com/ugd/696b8a_3cff75c991d749f0b359b949dfe86c34.pdf
    • https://static.usrfiles.com/ugd/3eed2b_f2ecfa1297f24e5082278ecdd3fc6251.pdf
    • https://static.usrfiles.com/ugd/696117_df61cb0eadb0418aa8e3f2803bc73915.pdf
    • https://static.usrfiles.com/ugd/d162e3_be6694f53b2243f99cef965a848ee4f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_58b5d391d825494a9a8833891b854cf2.pdf
    • https://static.usrfiles.com/ugd/10b11f_ed9a796fe104468c9f5751b3a3643909.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_9f1ff35b24174a7685134fc048d06243.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bda2b2792294a46a4d80023fb5bdc56.pdf
    • https://cdn.shopify.com/s/files/1/0437/3574/4673/files/honeywell_pro_3000_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/rainbow_hex_code.pdf
    • https://cdn.shopify.com/s/files/1/0464/8776/5160/files/kodaline_all_i_want_sheet_music.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_off00006361.bin
09126e6ea05f92ac70fa88079b1a4ed36f4a4ce607b8d18fb3602ac4eaa0a93e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 5888 bytes
font_01_sfnt_off00007780.bin
dbdcb57f9bf49b31c84a9e51cc6732b08054f883671a8b1a3eef9bbb1f8c5e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7780 10680 bytes

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