Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16d7c1cb5123e61…

MALICIOUS

PDF

43.4 KB Created: 2020-07-08 20:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01d9fe120e716cb3efd46e6786b0c556 SHA-1: 2e1b08e2eac3de55ec7d32d2fe7aa9d4efc5a038 SHA-256: d16d7c1cb5123e61cf661e46e0229e95e36a14a063ffc303a25baa4a2a8a37aa
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to PDF files hosted on various domains. One prominent link redirects to a malicious URL, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=grade%203%20math%20practice%20worksheets%20free
    • http://files.unitedconceptsllc.com/uploads/1/3/0/8/130815095/fapojiridej.pdf
    • http://files.hiddengemcanada.com/uploads/1/3/0/9/130969548/9cdff6406dc940.pdf
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdf
    • http://files.kayliegroff.com/uploads/1/3/1/3/131384145/tikolepotufido.pdf
    • http://files.condzellasfarm.com/uploads/1/3/0/9/130969555/97c8dd5b0b0479.pdf
    • http://files.vexsens.com/uploads/1/3/0/7/130775846/waforumuwanaxogudo.pdf
    • http://files.itsallaboutthefood.us/uploads/1/3/1/4/131454850/6832100.pdf
    • http://files.jackienorman.com/uploads/1/3/1/8/131860787/xewaguxevaxo_xarak.pdf
    • http://files.divinesoulenergy.com/uploads/1/3/0/9/130969819/d55ccdadbe3c.pdf
    • http://files.ethelbustamante.net/uploads/1/3/1/4/131406356/7012749.pdf
    • http://files.toymigos.com/uploads/1/3/1/8/131856381/61b8c1a.pdf
    • http://files.nickibylina.com/uploads/1/3/1/8/131856041/puvozagolapak_vogogosu_fexujegizuf.pdf
    • https://nurapanaki.files.wordpress.com/2020/06/44026159936.pdf
    • https://fotifumiwo.files.wordpress.com/2020/06/53807418702.pdf
    • https://doraxurewaz.files.wordpress.com/2020/06/sobokeju.pdf
    • https://lukipidize.files.wordpress.com/2020/06/87254854800.pdf
    • https://bexasoxepi.files.wordpress.com/2020/06/11843747083.pdf
    • https://peribigugur.files.wordpress.com/2020/06/xiligexadodagebesawif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.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_off00006ca9.bin
30b7b15fd1c32e22cb9001ddb5cb27990468fc2c768b073a09d6efed88505328
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 5396 bytes
font_01_sfnt_off00007f18.bin
ea2b041ce4adc2d705312cfea20cdb6f33c216e6b23fb108b928a84344f76a1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F18 9692 bytes