Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa30341562f9ea0d…

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 21:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b3ffb3663460003ef9bd273f39d1d8e SHA-1: 11722cf9fd0fbd8833a46617d285124754c4b7d6 SHA-256: fa30341562f9ea0d6a61c9a56fca628a5a77fdb30351f7077601c852425f5fc9
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Autocad dxf viewer' and the redirector URL, suggesting a lure to disguise malicious intent. The presence of a link farm heuristic further indicates a pattern of distributing malicious content via numerous external links.

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=autocad+dxf+viewer
    • https://cdn.shopify.com/s/files/1/0433/8103/1061/files/63915432239.pdf
    • https://cdn.shopify.com/s/files/1/0428/4284/9446/files/larada.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/51130840138.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/bubuforelozotininel.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/97602854510.pdf
    • https://cdn.shopify.com/s/files/1/0441/0982/4152/files/rounding_decimals_5th_grade_common_core_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/votenaromeri.pdf
    • https://cdn.shopify.com/s/files/1/0438/1330/6530/files/29023343005.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/nordvpn_vs_ipvanish.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7207/files/segezorawexisuvamiker.pdf
    • https://static.usrfiles.com/ugd/2f8cea_868e42a896ce45aaa65ab9f774b1257b.pdf
    • https://static.usrfiles.com/ugd/b47706_1b41f248682a473eb0398921e48097e0.pdf
    • https://static.usrfiles.com/ugd/003b86_d6fafb3495244a41bc14fa2cde65b7a6.pdf
    • https://static.usrfiles.com/ugd/a48928_e0bb34d7dfe94cd086f9158210ecfe57.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044b1.bin
79dc22f87183da1b9d45b1d6e1cda4898490f08bc38f0215ebfc6f6f2790e748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44B1 7560 bytes
font_01_sfnt_off00005dff.bin
09b9768d92a5c14bf8408e7d80162ec845bbbcf2b0d7223d0d118542482c339a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFF 5016 bytes
font_02_sfnt_off00006f39.bin
b4251b6066546c96816e994eeeee74ef21726708a0e6d7bcf94388ac50c51428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F39 9656 bytes

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