Malicious PDF — malware analysis report

Static analysis result for SHA-256 369394e79f88a1bb…

MALICIOUS

PDF

54.5 KB Created: 2020-08-31 00:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98bdb9a26ebfb4b042661d7cad77ed62 SHA-1: 960c2f9125ebe9fe8ab27a4060d7c73e6ad75449 SHA-256: 369394e79f88a1bb0c4d3d51cdd6383e0a5ac2a6945b644de08daabf50232f1a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=minecraft+pi+controls'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain the malicious URL.

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/wix?keyword=minecraft+pi+controls
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/34123292373.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4917/files/motorcycle_helmet_size_guide_australia.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/caligula_by_albert_camus.pdf
    • https://static.usrfiles.com/ugd/856cea_0b7e965dca8d4563af774126e34b9820.pdf
    • https://static.usrfiles.com/ugd/e2c250_e6e8b34a477d401190236d477488aa57.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/tifinitulixojivuduw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/baldi_s_basics_field_trip_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0447/7383/4901/files/apocrypha_online.pdf
    • https://static.usrfiles.com/ugd/47b1e8_f3320e2571b64f8a9f881dd7068b70de.pdf
    • https://static.usrfiles.com/ugd/18f527_d4272bf08ed84a5eb674c5347e11fd6d.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/
    • https://cdn.shopify.com/s/files/1/0437

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097b2.bin
5cd1b5918563ecd628d1fdba22387df78e15273556ffc6d9572514cd490a653c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97B2 5012 bytes
font_01_sfnt_off0000a8ce.bin
4d72dcc2e9e784d2fd5cdb467d014b2a1af94c75f69231609acdbfaa254a522f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8CE 10668 bytes

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