Malicious PDF — malware analysis report

Static analysis result for SHA-256 2028445874094c8f…

MALICIOUS

PDF

38.2 KB Created: 2020-08-30 20:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e27d1e6a9a74b32237c764c46caeaa9 SHA-1: 6608315d83d74b565a5cf066dc01ed3cf2e4e661 SHA-256: 2028445874094c8f077ecbdae8ad2924e52c7931934f810a37d7947d854e5a67
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, likely for SEO manipulation or to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.me/wix?keyword=ha+ho+gayi+galti+mujse
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/fipedinupijobopom.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/gozuzulevamovufogamugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/9887761669.pdf
    • https://static.usrfiles.com/ugd/b8c837_3462070560c4448b9b6904571638a6a0.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/dekinilapupuzegudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3088/0162/files/categorias_y_funciones_gramaticales.pdf
    • https://cdn.shopify.com/s/files/1/0440/4215/8245/files/40374451833.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/21466590214.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/wapidat.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5751/files/agriculture_books_free_download_in_tamil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041b9.bin
fdb86aae39fbcbbed3e1571ad1f27a2249749fcff6222aebd06695f49f38456d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41B9 4920 bytes
font_01_sfnt_off0000528a.bin
a444757c345678c02073924bbf3473f40f3906ec85beeaaf03aab73b1cba7011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x528A 13616 bytes
font_02_sfnt_off00007c96.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C96 4324 bytes

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