Malicious PDF — malware analysis report

Static analysis result for SHA-256 5922e7ba4e7c14db…

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 12:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a087b6c6297952bf6a6e08fdf7d78800 SHA-1: c7d6a56c2feef0b2f9f9afa6761bea434e400242 SHA-256: 5922e7ba4e7c14db0a92e8a52a2bca53aa2e211ad0b1d516eda1343effa95214
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially garbled, suggests a lure related to a 'registration form'. The primary malicious URL identified is https://ttraff.ru/pify?keyword=tceq+above+ground+storage+tank+registration+form, which is likely used for phishing or to serve further malicious content. No scripts were extracted, but the PDF structure and link farm indicate a delivery mechanism for external threats.

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.ru/pify?keyword=tceq+above+ground+storage+tank+registration+form
    • http://files.jrleadershipflorencecounty.com/uploads/1/3/1/4/131453733/widile-namojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/10765164414.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4355/files/40614500404.pdf
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/matirukidoxaxosevuxozifud.pdf
    • https://cdn.shopify.com/s/files/1/0437/5317/7237/files/80586443685.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/arch_models_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6551/files/60904543570.pdf
    • https://cdn.shopify.com/s/files/1/0437/9430/1085/files/33732394193.pdf
    • https://cdn.shopify.com/s/files/1/0428/9491/7799/files/89886458796.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/28347176509.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/80930973512.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/
    • https://cdn.shopify.com/s/files/1/0433/8

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed9.bin
80fc4b5f13c38c7f7a2149ab7aad39cce4b8af45040e820892fbd15829f2781f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED9 5648 bytes
font_01_sfnt_off000071f6.bin
f659b7c7b5a02e3a99adb422f1b07973b433010fa44ae6100bdba9cf9c9a5dd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F6 9592 bytes

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