Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc5c0df76cdb0e1…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 14:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bc64099ad28e4de3e0f19e688a70448 SHA-1: 2b483c9def23db1a815170a711a8a4e889a2c1d7 SHA-256: 3bc5c0df76cdb0e18b5c2ca324ca05eb0cce9b1e04097864b5430d34e3ade71e
120 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.ru/wix?keyword=high+school+musical+4+full+movie+english+download'. This URL is presented within the document body, suggesting a lure to download content. Another heuristic indicates a PDF link farm, with multiple links to Shopify domains, one of which is 'https://cdn.shopify.com/s/files/1/0428/2174/6847/files/electron_configuration_worksheet_answers.pdf'. The document body itself is heavily obfuscated but contains fragments of the malicious URL and a benign-looking PDF filename, reinforcing the lure.

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/wix?keyword=high+school+musical+4+full+movie+english+download
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/electron_configuration_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33078626275.pdf
    • https://cdn.shopify.com/s/files/1/0438/2880/5789/files/11155140014.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/lujiresadovilukatido.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/46880385275.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/lorufizafubufefot.pdf
    • https://cdn.shopify.com/s/files/1/0461/8233/4617/files/mumanodok.pdf
    • https://cdn.shopify.com/s/files/1/0435/7164/2527/files/inheritance_series_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/tekutipojevibopiwigeredon.pdf
    • https://cdn.shopify.com/s/files/1/0437/4197/0583/files/law_of_attraction_manifest_visualization.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cd207c692534bf2a75d0e5b8aa3f34d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bc6a584438644838b5e22bc81baf359.pdf
    • https://static.usrfiles.com/ugd/b8c837_05f9fd05704643bcb590d79a516f4ca2.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_off000069b8.bin
fdad2df7da051a6899c434523137bd0fc34bacb3de671ad04b2364f32b06f07b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 5540 bytes
font_01_sfnt_off00007c90.bin
5b1697eecbc9091f1f66dfed5f8e264aa3ac189ef6e0c07e8212e2b54c7b23de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C90 10260 bytes

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