Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9037da1f731cf8c…

MALICIOUS

PDF

43.2 KB Created: 2020-07-08 12:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77fbb396632e08dd38aad2beab4402e8 SHA-1: b876ac238b7d309a05674f60f26d99dd1e91fdcc SHA-256: d9037da1f731cf8ca3ecdd3ca33f94cf70db34869b2390c3177b793d7d712b12
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and IOCs. This URL is likely intended to lead the user to download a malicious file or visit a compromised site.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=fastest%20pdf%20reader%20linux
    • http://files.rioxpvista.com/uploads/1/3/1/6/131637034/36c763c9765.pdf
    • http://files.happycamperllc.com/uploads/1/3/2/3/132302999/ad981ea18b32180.pdf
    • http://files.mindfulserenityonline.com/uploads/1/3/0/8/130874629/pezozulaleku.pdf
    • http://files.eimearmcnally.com/uploads/1/3/1/8/131858481/lavolezilagopuvibexi.pdf
    • http://files.lauriannefiorentino.com/uploads/1/3/1/4/131437445/8414811.pdf
    • http://files.babysweetpeas.com/uploads/1/3/2/6/132695493/5736847.pdf
    • http://files.myovisioninfo.com/uploads/1/3/1/4/131452794/258740.pdf
    • http://files.hornsbyptsa.org/uploads/1/3/1/3/131379434/bomujakurufilo.pdf
    • https://lininor.files.wordpress.com/2020/07/ribex.pdf
    • https://ziziverip.files.wordpress.com/2020/07/voxevawoxesawalapilurele.pdf
    • https://juvolezo.files.wordpress.com/2020/07/97768135483.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_off00006c5c.bin
c88b47bdb827ccb9bb1ad593defe58b8068bca1884caaf3916b19a319900da49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5C 4832 bytes
font_01_sfnt_off00007ccd.bin
0b841d4e4a6bdcfa31273e36ae3fd58b4aa376238e708d4401cce5b9d547f7b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCD 10480 bytes

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