Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a213cae0a038df…

MALICIOUS

PDF

43.0 KB Created: 2020-08-22 16:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05a851f52d0ba368af561316c29456bc SHA-1: 109cd81528031a5bc8247e9f1b2b0bbfe25f9d4c SHA-256: a7a213cae0a038df6b49dfb563a8cfc8617def77568c5493f542480e616f1e3d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or unknown domains. The primary malicious link identified is https://ttraff.cc/pify?keyword=annihilation+of+caste+text+pdf, which is flagged as a malicious redirector. The document body, though heavily corrupted, also contains this URL and other links, suggesting a link farm or redirection scheme designed to lead users to harmful content.

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=annihilation+of+caste+text+pdf
    • http://jikiwajim.supherblendz.com/uploads/1/3/2/6/132683051/3777862.pdf
    • http://migezu.pwcyoga.com/uploads/1/3/0/8/130813834/0584f65.pdf
    • http://files.vonderhauswulfgermanshepherd.com/uploads/1/3/0/8/130813797/fivepeno.pdf
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/fraction_strips_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/0933/4696/files/folojejerujusibujepen.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/79776774989.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/in_service_training_for_teachers_narrative_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/77186899030.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/ensefalopati_hepatik.pdf
    • https://cdn.shopify.com/s/files/1/0459/5636/6495/files/apache_web_server_for_windows_8._1.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/58100483954.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8194/files/kadusutiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/64653171089.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/radev.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_off00006b25.bin
44d45df0cb392cd3d9ca2a3dc5c27b5d7d35f4130286a05ec67e57c0b1919214		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 5204 bytes
font_01_sfnt_off00007cd4.bin
75e929953f66afc20f966934c10ce8b1b39896abdf13549ae2ae7815324bb51d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD4 10120 bytes

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