Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a51a898a78b5d0…

MALICIOUS

PDF

43.4 KB Created: 2020-07-09 04:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6c78498e4fc0350acf1eedb856a254 SHA-1: 803e5886805f265af7795ac24f94401fc1ebc3a2 SHA-256: f1a51a898a78b5d0d4c40daa7bcf503335bbeae4920ddc24f1342baa81126c6c
150 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, masquerading as educational content to entice clicks. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one of these links directs to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=math%20worksheets%20free%206th%20grade
    • http://files.newleaforganizingllc.com/uploads/1/3/1/8/131857071/6418065.pdf
    • http://files.beeffoundation.org/uploads/1/3/1/6/131637034/dadigaguxa.pdf
    • http://files.mariecharpentier.net/uploads/1/3/1/4/131483019/batipaxadas.pdf
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.graham-enniskillen.com/uploads/1/3/1/4/131437172/nofupafa.pdf
    • http://files.dogoodstore.net/uploads/1/3/0/7/130776249/vibubokisexan.pdf
    • http://files.kimkirch.com/uploads/1/3/0/7/130775827/welobozutudirol-fulunim.pdf
    • http://files.lightningridgerealestate.com.au/uploads/1/3/2/8/132815961/tuwor.pdf
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdf
    • http://files.bucketoblood.com/uploads/1/3/1/4/131438808/junix_ninani.pdf
    • https://zaneraji.files.wordpress.com/2020/07/bazemev.pdf
    • https://litilazer.files.wordpress.com/2020/07/37186721005.pdf
    • https://vedaduleguxi.files.wordpress.com/2020/07/23511417127.pdf
    • https://mugitemos.files.wordpress.com/2020/06/jezofowajezetisodarujomak.pdf
    • https://kevumex.files.wordpress.com/2020/06/likozafofojeriliwemawozo.pdf
    • https://rilusepo.files.wordpress.com/2020/06/86010426678.pdf
    • https://xonumef.files.wordpress.com/2020/07/50123152834.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.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_off00006c78.bin
583c04fb8a3699340df50d5d058d8a6eeb8bc8545b444fc805862219c4e69cfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 5088 bytes
font_01_sfnt_off00007df4.bin
2226a6b86c5f5bd6ed4993048a9b24a33f48cfce88ccb0ea44d22f2baefbd5c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF4 10160 bytes