Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b6b9331675c0dd…

MALICIOUS

PDF

44.3 KB Created: 2020-08-31 06:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: babff8dd5b8ef2426f32b4ec71594054 SHA-1: 30e4a77bbcae1381871b74da001182605aa5ad60 SHA-256: b7b6b9331675c0ddd107f476a9314c197b034a9d6417ccc289d99182bef2ef12
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=cities+skylines+city+planning+guide', which is presented as a 'Cities skylines city planning guide'. This suggests a social engineering lure to direct users to malicious infrastructure. The presence of numerous other PDF links, some pointing to static.usrfiles.com, further indicates a link farm or redirection strategy.

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=cities+skylines+city+planning+guide
    • https://static.usrfiles.com/ugd/b8c837_1af16ffb28e6454c916cbb9a6fc20157.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d4ba40b1a6b4112bf25479cba565d0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c98e0e70f5b47a8b89258136dead7be.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/77184901936.pdf
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/bhagavan_das.pdf
    • https://static.usrfiles.com/ugd/5926b4_41ee2bb9f5a94cd9a5f79e854840758c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8fce1de2eb24df3b3711f40fff9cc48.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe8f302857a94cf19bec3f85718177bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_b023001898134fe8b6c924ffb909eb18.pdf
    • https://static.usrfiles.com/ugd/5b9a87_f1ba63b2aa684c7883142e33c0a279b9.pdf
    • https://cdn.shopify.com/s/files/1/0438/1949/9682/files/windows_media_player_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/bowuzadigiruvodejatedujo.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_off00006f45.bin
f8a08f06ddb75b87fb4252ab61aad5a928b66262d6fb6114844d4574b7646a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F45 5216 bytes
font_01_sfnt_off0000811e.bin
682cd5096325dc8eafe7884a5b343cce17920b22120895b8d3aa4fd968be84c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811E 10700 bytes

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