Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1910db506ad6d9…

MALICIOUS

PDF

121.1 KB Created: 2020-08-30 20:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75e5ea35dcb1e93de2e9191a92a4e48c SHA-1: 37ff565dfd105e6e51c23474ffd1f00f97956b1a SHA-256: 3b1910db506ad6d90c5ee99aad765ba6ad03b926ceab3908256968cd7d8959fc
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=1611+bible+pdf'. This URL is presented within the document body as a lure for a '1611 bible pdf'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation. The primary malicious URL is the most critical IOC.

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=1611+bible+pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/mubazikikitixibumoluto.pdf
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/3288246008.pdf
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/37384711518.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0375/files/92301641487.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6dc46405b074502859cef609ce0d915.pdf
    • https://static.usrfiles.com/ugd/b0b521_4f4f4adf12a34e11a2dbaba071d923d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a3a734cf46e429b9e3999b0607068bf.pdf
    • https://static.usrfiles.com/ugd/9f6a24_09ed9737be5e41f4b54142f2d0e064a7.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/24565342798.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5974/files/30592481891.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/49895380298.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/advanced_java_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3830/files/define_triple_bottom_line.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/63851676531.pdf
    • https://cdn.shopify.com/s/files/1/0440/7066/6392/files/33803074426.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_off0001924e.bin
8b6d39fe29065b98eeab7da82a5a0d90c537b00176b89a94957d1eb50f8e829f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1924E 4804 bytes
font_01_sfnt_off0001a2b2.bin
0625d715856769b67f505a4b4b6f0812868a435828debe4697029579cefcd2e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2B2 16612 bytes

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