Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d85e446e3bd420a…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 20:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ec275b749f186c33d14aff83c95b3c SHA-1: 9fe8fa25c90cbbb7786eb1ded84e8c867648c779 SHA-256: 9d85e446e3bd420ac9572092e7bd24c956704a5ab2aa6540965e0e000c386a34
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body text is heavily obfuscated but contains a URL that matches the redirector. This suggests the primary purpose is to redirect users to malicious content, likely for SEO manipulation or to serve further malware. No scripts were extracted from this sample.

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.ru/pify?keyword=blades+of+brim+mod+game
    • http://files.fenwaywestfield.com/uploads/1/3/2/7/132712407/jakirosiku.pdf
    • http://files.rlmcongo.net/uploads/1/3/1/1/131164424/buxobesu_zupazosugifo.pdf
    • http://files.americanitaliancancer.org/uploads/1/3/1/1/131163969/sipufujunele-pubipa-tofolozavoxize-xoxojopobasano.pdf
    • http://files.rhosarts.com/uploads/1/3/2/6/132695354/roxumefoxidibuseza.pdf
    • http://zekubika.haraldwiltsche.com/uploads/1/3/2/7/132740405/dudutuf_xalesodekon_luwilutafiwew_livul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fedixudarat.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/27275838271.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/principles_of_managerial_finance_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/sururisaxokan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28068876324.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/osu_skins_cookiezi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2950/2874/files/lulagabiduxun.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/minecraft_gun_texture_packs.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/10999640615.pdf
    • https://cdn.shopify.com/s/files/1/0439/0774/3899/files/weverilikabenu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/algoritmos_de_ordenamiento_interno.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_off0000621b.bin
6bf1385f558ea56649a143ad2c12ffd31ede89971ac7fdd00c7cdb2562df945b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621B 5416 bytes
font_01_sfnt_off00007467.bin
c63974ddd2d8a2ab65fa29027fe979eb4f8c2c05ad894c74fed0d1224f74d93e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7467 10072 bytes

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