Malicious PDF — malware analysis report

Static analysis result for SHA-256 9330248fb30cb932…

MALICIOUS

PDF

41.8 KB Created: 2020-09-19 18:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdac7aef0a6ec8cbf79c5d2435516702 SHA-1: 0648ad745d9df9cd60fb876d7cb282b2f199af96 SHA-256: 9330248fb30cb932391c531913c87c28a9b2816d383ef29f47bc66644523b7c5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.club/wix?keyword=barbu+d%2527uccle+price'. Additionally, it exhibits characteristics of a PDF link farm, containing numerous external links, many of which point to files hosted on filesusr.com. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the aforementioned malicious URL and several benign-looking PDF links, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=barbu+d%2527uccle+price
    • http://files.handmadehill.com/uploads/1/3/0/8/130873732/wufomebawufeli_fimeligoxud_mefazu_foripotavapuzo.pdf
    • http://files.cmglassdesigns.com/uploads/1/3/2/7/132740375/pewobubotipa.pdf
    • http://sitag.movingcompanyokc.com/uploads/1/3/0/8/130874330/tewidapuj.pdf
    • http://xejinaso.pianoforyouth123.com/uploads/1/3/1/6/131636627/8571322.pdf
    • https://81afe605-ebfa-492d-bcbf-16bbfcd75849.filesusr.com/ugd/84a5c6_b03b902dbaa2425e929e82b12ba0d3df.pdf?index=true
    • https://4d7d5402-423e-45c4-8263-ced82579f898.filesusr.com/ugd/ea78e0_b50f924479dc427091b75f3a0e47c1cd.pdf?index=true
    • https://3d1e2c35-28c0-44db-8faf-46e4a7ad6e4a.filesusr.com/ugd/a8ca0f_a699882c934d4ab3846f39838ef8a42f.pdf?index=true
    • https://6be558b0-da87-4418-98fc-d5d6967dff9b.filesusr.com/ugd/77eba6_63a368258d2047898c55df7773861e4c.pdf?index=true
    • https://2671e63f-e971-48c5-86ec-9bf5d285eaaa.filesusr.com/ugd/ce4b7c_09c1d2f85d43491db0e9aa5b01ef1c7f.pdf?index=true
    • https://3c1b7bc8-fd09-431b-8be4-21be02d78b47.filesusr.com/ugd/4bb894_4ff7b5c3e3a141309313693f05f0e4e1.pdf?index=true
    • https://3f98a065-e9ef-48ad-8289-1560e23fe15a.filesusr.com/ugd/b361c6_f390a9b40d2e4a3b87e84ab437511e65.pdf?index=true
    • https://8638d3fd-4b41-422b-9b5f-7aee99f0a083.filesusr.com/ugd/e2f7e1_5eeac944fcad48a19afdb9dd169026f9.pdf?index=true
    • https://59c8326c-195b-4f51-8260-17d4595e1a55.filesusr.com/ugd/c4ccc4_9ce49f1ebc484e3b99f66811983db0ca.pdf?index=true
    • https://910fdb56-3c01-44b9-81af-e8bcb4722ee3.filesusr.com/ugd/60ffa2_4227f312e5bc4b41b0e0315e9fb6d2d9.pdf?index=true
    • 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_off000063a8.bin
f4bf91b0862f18c4f57fd67ad16358aace0c21103d78385155d71c1613c1d7bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 5112 bytes
font_01_sfnt_off0000751a.bin
05ab8343eeff6fcd03ecab961e4a2f54cd797203e5b5665fbf332dcc3b5ca031
pdf-font-stream PDF embedded font (sfnt) at offset 0x751A 10944 bytes