Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad89954acfc2525c…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 09:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96157ccb36451cdb7f5c7b4b8e7f4a9c SHA-1: 324ec316f03160adc5dffc6731f5d24897d66aac SHA-256: ad89954acfc2525cadfbe436282da74c3ed429d16b27d8f152d01e0be3e087cb
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented with a keyword suggesting a lure for free 3D modeling materials. The document also contains a large number of embedded links, many of which point to 'static.usrfiles.com', indicating a link farm strategy. The primary malicious URL is the most significant 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=3ds+max+bitmap+material+free
    • https://static.usrfiles.com/ugd/98857b_b432cc2a701949fd8bca090754733966.pdf
    • https://static.usrfiles.com/ugd/38bf1f_52d941162f8d4965bec45a5d0457ee58.pdf
    • https://static.usrfiles.com/ugd/16a96a_204f9f71f5af486da3d527814f29b40e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0fd6ca95ad748b29772bbf24b52a278.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_f6e47be1cff04eeca94e192cd85361e8.pdf
    • https://static.usrfiles.com/ugd/0e2875_69fdae71218f4c5ba8a8297658fee1bf.pdf
    • https://static.usrfiles.com/ugd/d1c05f_c9afd0a006864b34908186000ec59f4f.pdf
    • https://static.usrfiles.com/ugd/0aab01_d57d3d47edd3476dbfc5dbdfe1a231c6.pdf
    • https://cdn.shopify.com/s/files/1/0434/8438/1337/files/7479690952.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3104/files/wafabuvopevifajuw.pdf
    • https://cdn.shopify.com/s/files/1/0462/3902/3253/files/85024633432.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1411/files/lufofevikilanew.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/kenneth_hagin_healing.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/amiodarona_farmacologia.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7113/files/rogeneruwefa.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/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a9a.bin
e660dd74c5eebebfa8863fac12dbc34c5696b4a3d3c4d0e799c6c0f37f0c7666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9A 5464 bytes
font_01_sfnt_off00006d13.bin
4e1ac8a18edce7ad4fe253cd42d4e989100ce1bab7904fc59c18d3bac2718743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D13 9968 bytes

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