Malicious PDF — malware analysis report

Static analysis result for SHA-256 403e63ed77231adf…

MALICIOUS

PDF

43.3 KB Created: 2020-08-25 09:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34190ea2e6d8d342c8a525b4763dc839 SHA-1: 0c24a69eba23491f1401937d8baa59f4114429d2 SHA-256: 403e63ed77231adff33462dc7198e1ee7eff0d86500ef2dd99bebf6a48f5a486
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=gap+credit+card+android+app'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The document body and heuristics suggest a lure related to invoices or payments, aiming to trick users into clicking the malicious link. No scripts were extracted from this sample.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=gap+credit+card+android+app
    • http://files.bankonmemphis.org/uploads/1/3/1/4/131407469/fuweza.pdf
    • http://files.brightongreen.org/uploads/1/3/1/4/131406036/miforiduwafuroxa.pdf
    • http://files.eggazine.com/uploads/1/3/1/0/131069978/gogazer-mizoxe-xaxile.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/93008785969.pdf
    • https://cdn.shopify.com/s/files/1/0434/2700/4577/files/actemra_package_insert.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/vetofat.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/45575925148.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/34812298824.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/job_applications_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/adobe_convert_to_word_online_login.pdf
    • https://cdn.shopify.com/s/files/1/0433/2617/7438/files/singer_3343c_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/51762019264.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/adobe_reader_windows_10_offline_installer.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_off00006caa.bin
4ec8660b60a48c53a50d72372cc7a1ae8359d8b56deb0ee7043f3293149a95f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAA 4888 bytes
font_01_sfnt_off00007d5a.bin
8d96eb40c9811dd102586c3e3c53ba950b4c0d8a116e1882d8f28b313040d814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5A 10400 bytes

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