Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f6cbd350e90b97…

MALICIOUS

PDF

61.1 KB Created: 2020-08-31 14:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb1e345404b0f11dce4f4f98da01069f SHA-1: 599abd8cb45fc8913c0cdf85aac223944f71111c SHA-256: e7f6cbd350e90b9713efb53eafceb5143050dd6ff26195deedb903a26020e699
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a resource for 'free microsoft org chart template'. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. 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.ru/pify?keyword=free+microsoft+org+chart+template
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/cara_membuat_cv_di_hp.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5888/files/bsf_tradesman_admit_card_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/mcdougal_littell_geometry_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/44208242791.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8597/files/92553055679.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/mezigoxa.pdf
    • https://static.usrfiles.com/ugd/ea78e0_fc26e8cc988049d0a0ecc03a365862dd.pdf
    • https://static.usrfiles.com/ugd/7d21c0_5f17d110003948aebcd7558a816ea7f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ac9f9b88e3c48abafbd446574e31abb.pdf
    • https://static.usrfiles.com/ugd/c83fdb_6061f60086c84dcf9fcb377d6b5ff956.pdf
    • https://static.usrfiles.com/ugd/b910ae_654a5499d5c74acf829c9f7984f361e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6750a3ee64b34a2597d692cbba752b09.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_off00009aa1.bin
853d77e103a9775da514b72b41617c038f427f4369c6917caf499dd4d88fa7af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA1 5384 bytes
font_01_sfnt_off0000accc.bin
5ab02bc0ade8490568b732eaf2f2ad12ef558e4d41e5897aa007082528f41ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACCC 11108 bytes
font_02_sfnt_off0000d227.bin
c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD227 16144 bytes

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