Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7afe4f5795778d…

MALICIOUS

PDF

41.1 KB Created: 2020-07-09 15:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a648daea591cdfec32a479a1c1ecfc9 SHA-1: c8f9106d7568da3db362ae73f6f6e922dbf239a9 SHA-256: ba7afe4f5795778d40c8e4a8de0b7f5df34936e93db26ee5aaf7d496919b6d41
150 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. One such link, https://ttraff.com/wb?keyword=introduction%20to%20management%20accounting%20notes%20pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs, suggesting a coordinated effort to direct users to potentially harmful sites. 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.com/wb?keyword=introduction%20to%20management%20accounting%20notes%20pdf
    • http://files.rockingcleatherandboutique.com/uploads/1/3/1/3/131383510/7375545.pdf
    • http://files.bookhivebeerclub.com/uploads/1/3/0/9/130969910/f65beae6b726.pdf
    • http://files.allenhurstapts.com/uploads/1/3/1/4/131482892/646d2043856.pdf
    • http://files.dukeunccls.com/uploads/1/3/1/4/131483371/6017493.pdf
    • http://files.thewallssager.com/uploads/1/3/0/7/130775846/zofudaxeluzun-vogake.pdf
    • http://files.retirementtimeline.com/uploads/1/3/1/4/131483154/gupebagig.pdf
    • http://files.grottonsinchile.org/uploads/1/3/2/7/132740294/bugopogokudu.pdf
    • http://files.leeshearman.com/uploads/1/3/0/7/130739828/duvozujedadibub-xifogerapimewaj-bemezinifu-popiza.pdf
    • http://files.tierrasmith.com/uploads/1/3/1/3/131398517/7846331.pdf
    • http://files.frenchstandardpoodles.com/uploads/1/3/0/8/130814145/simez.pdf
    • http://files.fre
    • https://rogofuxeviso.files.wordpress.com/2020/07/46027913632.pdf
    • https://niwupaxav18340559.files.wordpress.com/2020/06/vazojijitezovum.pdf
    • https://sabaliku.files.wordpress.com/2020/06/tijineluvumufuraz.pdf
    • https://jiwuxepasika.files.wordpress.com/2020/06/bisegaxunolotu.pdf
    • https://lidalavanepu.files.wordpress.com/2020/07/7185475103.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95909873105.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15796621189.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.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_off000064f0.bin
70be6a7c7675c05f8d2ece6b7d196d3ae1ba2508cd7bded74789ec4fc720bf2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F0 5264 bytes
font_01_sfnt_off000076b3.bin
5063ea42c8e6c7b5a0ff2f269274158db8b834d71239d26894d364fc32d7dc7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B3 9536 bytes