Malicious PDF — malware analysis report

Static analysis result for SHA-256 2295219bde4fb1fd…

MALICIOUS

PDF

55.1 KB Created: 2020-08-29 20:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95d9af645e9477991d7800e9218cb55b SHA-1: fe69a4399a220a4da7dea9bf77e647d5956aa26c SHA-256: 2295219bde4fb1fd9ca99420f3cc1458b3549cbfb9f8d41d343c48911f30fcbe
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=how+to+download+an+rmd+file+in+r'. The document body also contains this URL, suggesting the intent is to trick the user into clicking it. The file also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDF files, likely for SEO manipulation or to obscure the malicious redirector.

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=how+to+download+an+rmd+file+in+r
    • https://static.usrfiles.com/ugd/7598fa_c485c688dc444b1e9e27ddd9d7e323eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe0b654dd6f3450fa4922c0acb5911b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e2332e9d968435c90a88c7900c7f6ca.pdf
    • https://static.usrfiles.com/ugd/cc10e7_495ae52f6e144d37afb434fc0f1f6209.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/95126612127.pdf
    • https://cdn.shopify.com/s/files/1/0438/4443/6128/files/33671519393.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e92a1be85ce4516be70ff724960146d.pdf
    • https://static.usrfiles.com/ugd/b8c837_48236be519ec4488b87f6924a41652a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c071499630f4da8a037e399882d5f86.pdf
    • https://cdn.shopify.com/s/files/1/0429/2293/4435/files/rawemerivesasikatel.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4855/files/how_to_make_cellulose_acetate.pdf
    • https://cdn.shopify.com/s/files/1/0428/2299/2028/files/coordinate_graph_mystery_picture_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/biwajotatufi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/honda_fourtrax_300_4x4.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_off000094da.bin
3d97630224ac71a34ee30a7cb650694ecb445d0b9256d9a1b251547a2ac3d93d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94DA 4928 bytes
font_01_sfnt_off0000a596.bin
b7435c41ad3a3e56b8d0ca6e8b33d3f4bbdf026a9d3792e13ff8129232be1eb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA596 12972 bytes

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