Malicious PDF — malware analysis report

Static analysis result for SHA-256 e459dddde63600fa…

MALICIOUS

PDF

73.5 KB Created: 2020-09-08 17:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 480869e453ddead17b76707da60c120c SHA-1: 7c8b84924692788332f680ac2d92bd47ad9c24f1 SHA-256: e459dddde63600fa7c1e7f65e6e742f07c7330e48cce3acdc23445544dce8bd1
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'coliform bacteria pdf' and includes the malicious URL. The PDF_SEO_LINK_FARM heuristic also indicates a large number of external links, suggesting a link farm or SEO poisoning attempt. The SE_URGENCY_LURE heuristic further supports the social engineering aspect of this attack.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/wix?keyword=coliform+bacteria+pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/xavenaxugexoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/uc_browser_for_pc_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/1389/7372/files/fluoroscopically_guided_interventional_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0440/3537/5254/files/appleton_explosion_proof_manual_motor_starter.pdf
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/97037121685.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7341/files/fakat.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/17112854683.pdf
    • https://static.usrfiles.com/ugd/e948c1_1d9b7e63933e449f9dff36304bbf6d4d.pdf
    • https://static.usrfiles.com/ugd/493135_95f788606e1e4f26b291c143057a1bcf.pdf
    • https://static.usrfiles.com/ugd/0af078_d643b7c58a224d78ba30cabcb4e2ef44.pdf
    • https://static.usrfiles.com/ugd/2813e2_d2132b3cc6f24215a36632582b665f53.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa60f998f3ca46a0a3a5118adb8edc6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e20cf22dcff4ccd9db6f99ace2f907b.pdf
    • https://static.usrfiles.com/ugd/2b25e8_74c286657c1c4eba92504141e5322517.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c386b6eac7244b1864d68e86a4d93ad.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_off0000e39f.bin
41fbda8c5fa038af7f4a40b0efb17ffd5a4179cf088b12a1f077e094ece43ae1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE39F 5168 bytes
font_01_sfnt_off0000f511.bin
6401953457c88cb6ad18fefa360662ec05966ac53921750847e44595cd50b901
pdf-font-stream PDF embedded font (sfnt) at offset 0xF511 10608 bytes