Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec90b9e39f223b1…

MALICIOUS

PDF

45.6 KB Created: 2020-07-31 22:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b92403f7612581aad86f5509a2a35a96 SHA-1: 9cabe6e9b8e265a02e67aed39f7743cf03915a8d SHA-256: cec90b9e39f223b1551d86407fdabce49e60f437a2ae5196baf157111c03c724
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a phishing or redirection attempt. The document body contains garbled text but includes the target URL and a benign-looking PDF filename, likely intended to deceive the user into clicking the malicious link.

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.com/pify?keyword=monty+python+lumberjack
    • http://files.lifeclickscoaching.com/uploads/1/3/2/3/132303351/batej.pdf
    • http://files.mrsteadman.com/uploads/1/3/0/7/130776460/2484245.pdf
    • http://files.chakrachelsie.com/uploads/1/3/2/3/132303028/776f0ed29ef5d6.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0732/files/gavabuzit.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/rufifisiwubewakifu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/vupuvovovusigi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87678197609.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/25518915982.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/19149170422.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/kikuzeveguw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/mulibuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/86180434849.pdf
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/57818472389.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/87418809502.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/11075567045.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_off0000741f.bin
faa7ed58504407478895840cb1510154de1bc82cb6940715ce73080087fee8d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741F 5380 bytes
font_01_sfnt_off00008655.bin
4fc904d253581c64608fae9069510b0b230be6f87866cfd51a3cd17dbe5af687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8655 10340 bytes

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