Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9643999c28bdea…

MALICIOUS

PDF

49.4 KB Created: 2020-08-31 09:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b58a549d06df7795488c239368d4d508 SHA-1: d252cc3de21ce1367534097f8a0fc3ed84854820 SHA-256: bb9643999c28bdea3c89148a35c0c596642c9fa67cb4376a1acbbed7964e78c9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=read+catherine+anderson+books+online+free'. This URL is presented within the document body, disguised as a link to free books. The presence of a large number of external PDF links, many hosted on 'static.usrfiles.com', further suggests a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=read+catherine+anderson+books+online+free
    • https://static.usrfiles.com/ugd/b8c837_4bc6a584438644838b5e22bc81baf359.pdf
    • https://static.usrfiles.com/ugd/2f8cea_e707ca3ed79145e384c65979fc71ce48.pdf
    • https://static.usrfiles.com/ugd/db93e9_d23a1c66662940b1ab0899123090534f.pdf
    • https://static.usrfiles.com/ugd/48f461_3a5bad8ba358466fb9903f459ca75992.pdf
    • https://static.usrfiles.com/ugd/760101_90c98aa6f7854fb9a90756d009aa842a.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_a3bb853a82d944febcebdb719d65ef77.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e7b5ca34de4477683cca469eae79e17.pdf
    • https://static.usrfiles.com/ugd/de65f7_43b1901a57a641428098490e965ea8af.pdf
    • https://static.usrfiles.com/ugd/ab059d_e08fb8a54259405ea6707048dc1c1c4f.pdf
    • https://static.usrfiles.com/ugd/90c678_20353602ba124cdda855f69c3c0feb7b.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/voicemeeter_banana_hotkeys.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/96385019365.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_off00008233.bin
5a04af456973f165baba72cf4d0f310338f7eee61255d57985aa1d45ceee517e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8233 5320 bytes
font_01_sfnt_off00009443.bin
f8d6b53ae58c126f41ebed3cd8e7b819b7290e967a0e25d0357c5acf9471ea3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9443 10748 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.