Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca0ab9a079f800a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-09 12:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ab0d1b2a4232a2c96b1da2675f7c7f2 SHA-1: 4b823605672bd066f74e1d0a1026bc4a80dee59d SHA-256: 2ca0ab9a079f800a318646b39f42f23cf7d80e2d96ce8492d74bf8b186bd6258
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a redirector URL, indicating a phishing or malicious redirection attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=cours+nutrition+musculation+pdf as malicious. The document body, though partially corrupted, contains text related to 'Cours nutrition musculation pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to download a seemingly relevant PDF. The presence of numerous Shopify links, while many are confirmed benign, contributes to the link farm characteristic.

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.cc/pify?keyword=cours+nutrition+musculation+pdf
    • http://files.bdlit.com/uploads/1/3/2/6/132681851/971734.pdf
    • http://files.wintership.com/uploads/1/3/1/3/131398008/a1acce1227.pdf
    • http://files.fazzledazzle.co.uk/uploads/1/3/0/9/130969080/rididisobono.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/73645512994.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/84281082742.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/3382556579.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/vufekupofojifoxejuwifaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/58281537141.pdf
    • https://cdn.shopify.com/s/files/1/0433/3669/5959/files/venimaxinipusuxutakopurim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5483/3557/files/dorinimojejekemakasun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/dujoketewedipogitewepodob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94215193789.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/zijineba.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7157/files/35120028336.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/jatawikupupati.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_off000063ee.bin
1644e3de1e59ae22d0cc7c23514d2e42460ba58563b0566d6058a5019540667a
pdf-font-stream PDF embedded font (sfnt) at offset 0x63EE 5208 bytes
font_01_sfnt_off0000758a.bin
8644fd1454e74c0c91fc80d537ed1c73a1bf9b3845ad875b76627ac6f4b50e57
pdf-font-stream PDF embedded font (sfnt) at offset 0x758A 11000 bytes