Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5292089b6e24b4…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 03:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acf4609e4af48b2b5220bc4ad0abe47b SHA-1: e844451d6ad4d5a157d51e8f02ae2d2b46fb8e0b SHA-256: de5292089b6e24b41352705c73eac7c26f980e636c797da75dc5c50d92c5760c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=design+sprint+academy+facilitator+guide`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, one of which is `http://referemut.get2knowisi.org/uploads/1/3/1/3/131398069/f33942b3df16687.pdf`. The document body, though heavily obfuscated, contains references to the redirector URL and other Shopify links, suggesting a lure to external malicious 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.ru/pify?keyword=design+sprint+academy+facilitator+guide
    • http://referemut.get2knowisi.org/uploads/1/3/1/3/131398069/f33942b3df16687.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8293/files/bdfl_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0451/1278/7109/files/electronic_devices_and_circuits_by_jb_gupta_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6258/1658/files/gaspard_de_la_nuit_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/zuvefavebulumovijuwix.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/35808325986.pdf
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/45266272863.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/joguxudelorageteni.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/pdf_notes_on_child_development_and_pedagogy.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2092/files/barreras_ambientales_o_fisicas_de_la_comunicacion.pdf
    • https://cdn.shopify.com/s/files/1/0437/1048/0533/files/54536781804.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/gimarevenotiwelobufozarim.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_off000060fb.bin
2a15b65f7b4701216ac7fecd09200a0fc7e9b81b33528b5f6431f1d556e13894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60FB 5576 bytes
font_01_sfnt_off000073dc.bin
76b0c839b00e5d6b94b4eec02c430a97b6adbe31340f8a96297c07e357a6beef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DC 10888 bytes

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