Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26e8cb24c0ec24c…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 10:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c2eb916dd21756c11542dbcf0f6f90d SHA-1: 960de67263f9181bdca7fe83f132dd9aa821b2c3 SHA-256: b26e8cb24c0ec24c6772c82ea271ec8db30e92a22143d43eecc071a1f4bc689d
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though partially garbled, contains text related to 'Boletin informativo escolar para imprimir' and a URL that appears to be part of the malicious redirection chain. This suggests the document is designed to lure users into clicking links that lead to malicious sites.

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=boletin+informativo+escolar+para+imprimir
    • http://files.oschernandez.com/uploads/1/3/0/9/130969206/fatigupovig.pdf
    • http://files.cejdentalaccountants.co.uk/uploads/1/3/1/4/131436956/runokunivilejaxinabe.pdf
    • http://files.decatn.org/uploads/1/3/0/7/130739095/morizewi.pdf
    • http://files.samanthacotterill.com/uploads/1/3/1/8/131871621/5192610.pdf
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/13686654859.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/cansat_mission_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/81648474024.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/witowizuxos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/carrier_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/32592010453.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/gavemoni.pdf
    • https://cdn.shopify.com/s/files/1/0429/7320/0537/files/xuxigajiwexiwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3600/6817/files/73946605712.pdf
    • https://cdn.shopify.com/s/files/1/0431/4290/6007/files/mewafogodas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0052/8033/files/principles_of_agribusiness_management_fifth_edition.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_off000067ee.bin
760ee75ae3f95377c8ee24db2bb578a9c326791a8bdfad8c21b00be56e134e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EE 5268 bytes
font_01_sfnt_off000079c8.bin
0dfffa73252fb24650e8bd290c7d750549454b83e2db2b2684582cff721fb4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C8 11320 bytes

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