Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1190030c7b3edd…

MALICIOUS

PDF

41.6 KB Created: 2020-08-31 00:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe4598cb68d642544d84541b1dd56579 SHA-1: 0fe616241088585485dca0dd6d88d22c694a87a6 SHA-256: 1b1190030c7b3edde90d725f5c4b43407492f7d25a264f832a18655a8a90df89
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including a critical link to a known malicious redirector at https://ttraff.cc/wix?keyword=ncidq+study+guide. This indicates a phishing or scam attempt, likely to redirect the user to a malicious site under the guise of providing a study guide. The document body contains garbled text but includes the target URL and references to a study guide, reinforcing the lure. No scripts were extracted, but the PDF structure itself is used for 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.cc/wix?keyword=ncidq+study+guide
    • https://static.usrfiles.com/ugd/b8c837_c22b1b2e990942fdb564d53f60248541.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1a25227efe24efa84f4228e272ced14.pdf
    • https://static.usrfiles.com/ugd/271e65_21600b2ce5a24e028ab688bd6996d233.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bb1a4cef80c490d9b7138e7d24b7a8e.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/nour_al_bayan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/xolofavutivewuxum.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/13691180369.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/59859289543.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/zonalutabovolegepuzogakuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/buretotokogabaditez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4952854333.pdf
    • https://static.usrfiles.com/ugd/ce5d00_8a4222ab04634f9395adb8ce7a7a2aae.pdf
    • https://static.usrfiles.com/ugd/c12414_74fde22392a6475fb1b2c9d1113e5c46.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0d43d1519814115b32301c81109aad9.pdf
    • https://static.usrfiles.com/ugd/b8c837_e78e36a1c22747dcb339d72b2da3f9c5.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_off00006277.bin
1c203fa037d9531a4f7d0a99da5532f1f47866253c02f67815fd7ee430d535d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 4968 bytes
font_01_sfnt_off00007372.bin
56d16495ae06fa310ff04ca0d990aa9f635fbb28d5d85ad225b50e2e72a4e3e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7372 11004 bytes

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