Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc4a7d658e46960…

MALICIOUS

PDF

41.1 KB Created: 2020-08-11 00:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b02ddbac4ad7edb384ac8f0de8b638f SHA-1: 7e05f7670d118822042f734a39ce2f5a2454cf80 SHA-256: ffc4a7d658e4696078f5257037673cfae949ab5e4c013ad0819692d8bcfc722d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at https://ttraff.cc/pify?keyword=wall+chart+of+human+anatomy+pdf. The document body text, though partially obfuscated, also contains this URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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=wall+chart+of+human+anatomy+pdf
    • http://files.bigbreaknation.org/uploads/1/3/0/7/130739783/bemusuwuxeravaf.pdf
    • http://files.tchsdance.com/uploads/1/3/0/8/130873918/2045e56761.pdf
    • http://files.seanaffordfineartstudio.co.uk/uploads/1/3/1/4/131438461/9233b5592b64.pdf
    • http://files.lancecrane.com/uploads/1/3/1/3/131384489/tupexuwenafiw_tisuku_vexaravoxiki_vitigavineme.pdf
    • https://cdn.shopify.com/s/files/1/0440/8007/0808/files/agenda_2020_sustainable_development.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/31499084366.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/47156338755.pdf
    • https://cdn.shopify.com/s/files/1/0430/5823/3493/files/79841148344.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/lorijovelegoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53681635306.pdf
    • https://cdn.shopify.com/s/files/1/0447/5407/5799/files/29186081528.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/11029613613.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0440/9432/4888/files/60351632562.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_off00006370.bin
32b221295f08f792f092bcf805c026ef168b3551f0028cd4382e7a775da11bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6370 5332 bytes
font_01_sfnt_off0000757c.bin
a6deb323ba48fc1f1c937b1ea067b013b601902a9fcba6146bd41421371b515e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x757C 9968 bytes

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