Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bec1379819c81e5…

MALICIOUS

PDF

87.2 KB Created: 2020-08-30 23:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7ef2d6c65036d194c97c29b576c4d37 SHA-1: 29b1a2c01a24478da034a314f89de6b25263eb53 SHA-256: 4bec1379819c81e5c2bb3b22252c0f26f0401cf2ed21ef85c82ff4c557c5610a
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=battlestar+galactica+ps2'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. 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=battlestar+galactica+ps2
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/97114675706.pdf
    • https://cdn.shopify.com/s/files/1/0465/9511/3125/files/tibukirabiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8805/9293/files/buvividu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1874/6013/files/behold_the_lamb_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/88403848261.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1464/files/fazewuwin.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/635577497.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/23253222265.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/vuzotososojilumovuvunibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/hollywood_babilonia_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/tabasada.pdf
    • https://cdn.shopify.com/s/files/1/0443/9290/6918/files/visiting_card_design.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/whatsapp_notification_sound_iphone.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b38.bin
d9431ed3a263d1afa50c18272d05c2b49a92e62f4c42d0854e64bf6f4e0078ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B38 4856 bytes
font_01_sfnt_off00011bcb.bin
98d568bb9a782e57570dd2d2bb4e94a1673b6867916699735777ae0f8fbd12e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCB 10972 bytes
font_02_sfnt_off00014130.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14130 4324 bytes

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