Malicious PDF — malware analysis report

Static analysis result for SHA-256 8522ca4a36985f60…

MALICIOUS

PDF

38.3 KB Created: 2020-07-08 13:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50def881a53e6ab236815105143e23fb SHA-1: 20c535028ef6811cf1b58b0e9a435876b521507d SHA-256: 8522ca4a36985f603c213e9e66ae9c464288ca5d182ae29a894f6f19c5df76e1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary heuristic indicates that the document links to known malicious redirector infrastructure, specifically `https://ttraff.com/wb?keyword=fundamental%20counting%20principle%20worksheet%20easy`. The document body also contains numerous links to PDF files hosted on various subdomains, suggesting a coordinated effort to drive traffic to potentially malicious sites. No scripts were extracted from this sample.

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/wb?keyword=fundamental%20counting%20principle%20worksheet%20easy
    • http://files.match-gems.com/uploads/1/3/0/9/130969243/waruxe-gibotusupuwe-viputefetapaj-walugogigebomev.pdf
    • http://files.pharmavetsa.com/uploads/1/3/0/7/130739383/kopugipigoreguze.pdf
    • http://files.agbcontracting.com/uploads/1/3/2/7/132712514/2125422.pdf
    • http://files.nativetales.com/uploads/1/3/0/7/130775942/b90bae542e.pdf
    • http://files.firstathens.org/uploads/1/3/2/7/132710687/9347935.pdf
    • http://files.thecherigroves.com/uploads/1/3/1/3/131398156/0c09cff1c7.pdf
    • http://files.amselectric.com/uploads/1/3/0/8/130814868/5237300.pdf
    • http://files.durhamcontractorstx.com/uploads/1/3/1/4/131456012/xitiluwabiziwu-jukemosiso-wanusowedu.pdf
    • http://files.sfwarevents.org/uploads/1/3/0/7/130776514/1c17f7d.pdf
    • http://files.focusedlearningsolutions.com/uploads/1/3/1/6/131636990/49d8e9.pdf
    • https://bidakujuvob.files.wordpress.com/2020/06/81828067654.pdf
    • https://livafoke70179874.files.wordpress.com/2020/07/21561704104.pdf
    • https://dafutinak.files.wordpress.com/2020/07/berafuxolimepawavudeg.pdf
    • https://defamufomowa.files.wordpress.com/2020/07/5301367289.pdf
    • https://tujurufofeze.files.wordpress.com/2020/07/rozaviwofu.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_off000056b7.bin
8288ef7691ba718e209974ab587017209235f1095d016432625367e9917b63ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B7 5584 bytes
font_01_sfnt_off0000699a.bin
831f12a24b860eebe20ec196127dff7aaa8d599b76afb2a4ed8b506db9fb1804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699A 10240 bytes

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