Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf31a09367cc8ef4…

MALICIOUS

PDF

55.5 KB Created: 2020-08-29 18:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48e22781b36d71d4d26600a1d92b3135 SHA-1: 626f464e119ba4cba1930284b38a04209900f1ae SHA-256: bf31a09367cc8ef4d676463068dcccd217e4e3ab05290fb2ecd5ff825810b2f9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with 28 links identified as part of a link farm. One of these links, https://ttraff.cc/wix?keyword=warlock+build+guide+5e, is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting it is the primary lure. The file's purpose appears to be directing users to malicious infrastructure through this link farm.

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=warlock+build+guide+5e
    • https://static.usrfiles.com/ugd/b8c837_1cd3d2001f3f4b24a3b17dcfecd18bb8.pdf
    • https://static.usrfiles.com/ugd/93c935_f29563c0c9964032885eaa77f64fef64.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c7a57557ae546768cdda66454398000.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/28679650266.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/86083569145.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/63966854136.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/84303272621.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/byte_array_to_bitmap_xamarin_android.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/xd_meaning_in_text.pdf
    • https://cdn.shopify.com/s/files/1/0435/0138/7936/files/71266551563.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_01670ac500bb4bb3a1d13777c5d9ff1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9a46efa61334b1a8f11765b61ed0241.pdf
    • https://static.usrfiles.com/ugd/b8c837_cdc77f2aa0844d95be48d2cfbe874bbd.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/
    • https://cdn.shopify.com/s/files/1/0429/3741/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009bbc.bin
06575b435a3c299a9b26fb6357def5552b5e9c4407e965ac39dd0e60de83f2f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBC 5268 bytes
font_01_sfnt_off0000adc0.bin
b790015285f1be53542252cf43aca9979f2f6fee76d62ad1c2d1f3a3d12e9bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADC0 10420 bytes

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