Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3b5998f2dbb730…

MALICIOUS

PDF

43.9 KB Created: 2020-09-05 07:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 858c2ad9599d2177388de453847aaebf SHA-1: 8b1bdb66268a0cf2696729dbfce6ef304b2edc21 SHA-256: ae3b5998f2dbb730737ff9d2dda5ba8010e2737556ae411e386badb556b433fb
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to a URL designed to lure users with search terms like 'businessman movie video songs hd'. This URL is the primary indicator of malicious intent. The file also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or redirection strategy. The document body, though heavily obfuscated, contains the malicious URL and references to benign-looking PDF files, likely to mask the malicious redirection.

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=businessman+movie+video+songs++hd
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/4626989878.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/webukefuke.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0409/files/9189362124.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/duzuwosujatonom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2516/files/arrow_icon_svg_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0845/7877/files/angle_bisectors_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/29529541313.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/51630023194.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/50558217757.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/32501740129.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8308/files/89053051663.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/zetovilezugakug.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/60947345528.pdf
    • https://static.usrfiles.com/ugd/6908d7_dd543d00b49f49b8a43c905a958a78f5.pdf
    • https://static.usrfiles.com/ugd/7ff653_69ca294443c743e1a4a7edaec08616f7.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_off0000655f.bin
4b764b514fd504a1437ebb4348074536022400794a67457724b6a1a4f9e8d7c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655F 5220 bytes
font_01_sfnt_off00007706.bin
bf632edfe6cda1a072ad14d989828a14d8ed79a1d044925b1e061d01869043a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7706 13624 bytes

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