Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b320e0f26a99b9…

MALICIOUS

PDF

43.8 KB Created: 2020-09-01 00:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 702a94084c2008a4ff4f8211b39a3f9d SHA-1: 46ee8783cde0d6218b4f0bd8f91ef0c565df2a45 SHA-256: 21b320e0f26a99b94e853cf03eb09267baed5523b65b1e4eb1abc6f345f49016
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, intended to lure users to a malicious site. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=excel+template+for+splitting+bills' which is flagged as a known malicious redirector. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting a broader SEO poisoning or spam campaign.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=excel+template+for+splitting+bills
    • https://static.usrfiles.com/ugd/ab0441_69782c66fe9942f2b21244a1915ffaf3.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_468bc6b335e24c8eb21c27f83025e8c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8e836acaa924b13917c393c764f084a.pdf
    • https://static.usrfiles.com/ugd/29c71c_368bf0273f8d4ccb85308a804793f2ce.pdf
    • https://cdn.shopify.com/s/files/1/0432/6070/6971/files/business_trip_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/5597/1492/files/nazuxakokuwokafisugazira.pdf
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/mellanni_bed_sheet_set_canada.pdf
    • https://cdn.shopify.com/s/files/1/0429/7470/7868/files/weeping_cherry_tree_planting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0441/3983/9640/files/antrenman_geometri_2.pdf
    • https://static.usrfiles.com/ugd/f80014_bf9d4c4221194af9816164df5493560d.pdf
    • https://static.usrfiles.com/ugd/b8c837_33a20c2671d049069480350bf5f2db69.pdf
    • https://static.usrfiles.com/ugd/3f80ec_96d060a6ce704d8484522cfb74cca37e.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_ed110564f71143b58f9c4b25c686ae9e.pdf
    • https://static.usrfiles.com/ugd/0c41e7_8ae334aaa3874e178e0d5d803ba9c11b.pdf
    • https://static.usrfiles.com/ugd/e2b09b_13f5ad9aeb6345f7a886b1470d3d0419.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a3a734cf46e429b9e3999b0607068bf.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_off0000660c.bin
6e13da00adf7dc0e0cf7ffccabbde98f1077f0247a4091cc162f784e3bee3664
pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 5500 bytes
font_01_sfnt_off000078b6.bin
4dfe88757ae78b89982db1b6b717d84185c95d9d0bc66f76cd1a36cba827000c
pdf-font-stream PDF embedded font (sfnt) at offset 0x78B6 12436 bytes