Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3cfc12092a51e3…

MALICIOUS

PDF

47.0 KB Created: 2020-09-05 06:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b208bf323f724af5b484a2c23c68ac SHA-1: f37a700e59e96f9fdabb161c37107a89cbb09148 SHA-256: 8e3cfc12092a51e3580c9a5d4d78b785e6cb28c4e5297543338e8cfb121e572d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.link/wix?keyword=google+sheets+filter+function+string`. This URL is presented within the document body, suggesting a phishing or social engineering attempt to redirect the user to malicious infrastructure. The presence of a mass external PDF link farm further indicates a malicious intent, likely for SEO poisoning or traffic generation to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=google+sheets+filter+function+string
    • https://static.usrfiles.com/ugd/b8c837_3ee8675375dc43979a5a34d93c91d2d8.pdf
    • https://static.usrfiles.com/ugd/db1da1_419f70d8ab3c4bea82805c1f67d03da9.pdf
    • https://static.usrfiles.com/ugd/a891c0_a23f8633704b4ca5880dc50f3e669ed1.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab181c78135d41809a4d3d37dd25602a.pdf
    • https://static.usrfiles.com/ugd/952c2e_7487f3857a9849ffa838cd5fbaffdccc.pdf
    • https://cdn.shopify.com/s/files/1/0433/4678/8502/files/chocolate_chip_cookie_dough_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/autocad_to_converter_free_software_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/8215/7981/files/current_resuscitation_council_uk_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/9028/0609/files/96595470618.pdf
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/10564408687.pdf
    • https://static.usrfiles.com/ugd/8b9728_f1e107a50142448084bd3672ce2c83f8.pdf
    • https://static.usrfiles.com/ugd/97493d_7957a223c4d84b7b90735f1b9a0cbf9b.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_21cce24a191241579a5b1324040f49de.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_off000079c1.bin
1c2c190d474e69b70e262d39f26f8f6088e5e3376c41f8fc9de4d7b2ddac4576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C1 4964 bytes
font_01_sfnt_off00008aaf.bin
30dbdb9bac9d842cc20c2ea84bfe2dd893bfaba9d114492fe210e0cbd0ebc86e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAF 10716 bytes

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