Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94bf676e4440623…

MALICIOUS

PDF

47.3 KB Created: 2020-08-04 02:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab94f6d7975313741532e95ea0607a66 SHA-1: 20badbe9e92bcd02cd8cdf8fc694f6c6440030e4 SHA-256: d94bf676e44406239c2c0e3a980b7d9a66f2aa9f62df57c89366797d3ec9955f
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, which points to 'https://ttraff.cc/pify?keyword=chemistry+notes+for+class+11+sindh+board+pdf+free+download'. This URL is presented within the document body, disguised as a link to educational content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for 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/pify?keyword=chemistry+notes+for+class+11+sindh+board+pdf+free+download
    • http://files.koerpertherapie-massagen.com/uploads/1/3/0/7/130776855/zoloradito-fasemev.pdf
    • http://files.simeonsolomon.com/uploads/1/3/0/9/130969879/wekuruwuvo-wajin-vofam-porisanaxo.pdf
    • http://files.jeelsphoto.com/uploads/1/3/0/8/130813881/7e1cf9fa5f6.pdf
    • http://files.hyggeorganic.com/uploads/1/3/1/3/131379719/a330fd59c01.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0296/files/37013424306.pdf
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/badubeterowelokizali.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/33680055115.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/98982635997.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2037/files/49039454519.pdf
    • https://cdn.shopify.com/s/files/1/0434/4217/6150/files/73169780356.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/18429741728.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/54689998240.pdf
    • https://cdn.shopify.com/s/files/1/0450/4734/9406/files/millennium_development_goals_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/xasawitaburinilurapik.pdf
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/falolexumomuxenudozimodor.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_off0000793a.bin
be9544723da4ef0cf686dc8dbf9ceb61f459ab0a87bd8a8aba469e358e7101e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x793A 5684 bytes
font_01_sfnt_off00008c75.bin
d90bc1cebafc2c40e55b32f3c2357e49ae2ebe0d2b293644cc6c39ffc0f67d82
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C75 10272 bytes