Malicious PDF — malware analysis report

Static analysis result for SHA-256 379f7d7c5f1cbb46…

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 19:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c10f84578614057a28e10d1770f1b0c SHA-1: ba3dab824958a12c6f146e1ebecdf72bf3863d02 SHA-256: 379f7d7c5f1cbb463e23de5747496785d3dddadec5e3f9316d8599c70ef4f46f
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.com/wix?keyword=baby+dress+patterns+free+download'. The document body also contains this URL, suggesting a lure to download free patterns which redirects to malicious infrastructure. The presence of a large number of external PDF links further supports a link farm or redirection tactic.

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.com/wix?keyword=baby+dress+patterns+free+download
    • https://static.usrfiles.com/ugd/7c30af_de9e283b848d48e4aa1d3846f5eab8a0.pdf
    • https://static.usrfiles.com/ugd/822ecd_f87b7526241749378800967087265238.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd3875ed58e4479f9257bb919d4fccaf.pdf
    • https://static.usrfiles.com/ugd/8e1900_371cc04abcb0447eb65f2cdd9e3d0387.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/12_month_cash_flow_statement_template_xls.pdf
    • https://cdn.shopify.com/s/files/1/0437/6454/7741/files/papatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/autocad_electrical_import.pdf
    • https://cdn.shopify.com/s/files/1/0431/7737/7958/files/cumulative_frequency_graph_and_box_plot_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/18200161945.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/96403688099.pdf
    • https://cdn.shopify.com/s/files/1/0432/2780/7908/files/balarama_mayavi_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/nijokigazemap.pdf
    • https://cdn.shopify.com/s/files/1/0438/5977/1557/files/wiwafibix.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_off0000660f.bin
192cb5d76182fc47b645e46a91540679063e4513b988fd849dbbe8082abc6231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660F 5420 bytes
font_01_sfnt_off0000789a.bin
48930ce8ba3cb3d0cdf06f1000c9b532eb23463a8a1c56dc2357746a556d352f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789A 10480 bytes

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