Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ba9a9e9c5bc44c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 16:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61592bc87acf37fc78480f44b2183c47 SHA-1: f7096ea8035dc6ead4798cb08eedbea2c48d4702 SHA-256: 93ba9a9e9c5bc44c769a6bff48871540711c197f603d7974c84e3cebab44764c
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One URL, 'https://ttraff.com/pify?keyword=enlaces+quimicos+unam+pdf', is flagged as a malicious redirector. The document body is heavily obfuscated and contains a large number of embedded links, many pointing to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute malicious content through a seemingly benign document.

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.com/pify?keyword=enlaces+quimicos+unam+pdf
    • http://files.hartmanreserve.org/uploads/1/3/0/7/130739789/mexon.pdf
    • http://misugiluj.jamesstockartwork.com/uploads/1/3/2/6/132683014/tegumuro.pdf
    • http://files.pixelthisky.com/uploads/1/3/1/3/131384071/fuwukuseze_niwefu_sumud.pdf
    • http://rimexeput.almosthomecare.com/uploads/1/3/2/7/132741066/rawutenofuvowag-xojuxed-zobekawogaju-duxokulipix.pdf
    • http://files.robohounds.com/uploads/1/3/1/8/131856569/711e87cbfe05053.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7067/files/2114348613.pdf
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/mechanical_measurements_6th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/zoputujot.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/bipap_ventilation.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/26119919368.pdf
    • https://cdn.shopify.com/s/files/1/0438/9978/1275/files/aufenthaltstitel_verlngern_mnchen.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/iso_9001_internal_audit_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8357326041.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/kasuzer.pdf
    • https://cdn.shopify.com/s/files/1/0438/3883/2800/files/mii_qr_code.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_off0000660a.bin
b20f88a2e1e5beb36da5cf665f45d33650ade7c7f781a84759edc55c8f8b12e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660A 5288 bytes
font_01_sfnt_off000077f1.bin
638e462f9ab9e53ae8f5c854c36209f83e079c567897717c8de6a7e3fc36ca85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F1 11088 bytes

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