Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b24a2bf6a7f327…

MALICIOUS

PDF

43.9 KB Created: 2020-08-05 06:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51e30cc8f98004433bcbe11b05df0348 SHA-1: 749376e858968ab6bd0482262b27a382fb6d6163 SHA-256: 62b24a2bf6a7f327b0d6018146f8e6c608f2a14cb9c77456d4bd9374b396b618
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The primary link identified, 'https://ttraff.com/pify?keyword=cardiopatia+reumatica+inactiva+pdf', is flagged as a malicious redirector. The document's structure suggests it is designed to host a link farm, likely to distribute further malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=cardiopatia+reumatica+inactiva+pdf
    • http://files.motherwilsonswisewords.com/uploads/1/3/2/6/132681464/defito.pdf
    • http://gojoxena.edenshepherds.com/uploads/1/3/0/7/130738970/3292204.pdf
    • http://files.floridaaquaticbiologists.org/uploads/1/3/1/3/131398250/6480983.pdf
    • http://files.janelletherien.com/uploads/1/3/2/7/132741176/rebozokesij_makemoripapu.pdf
    • http://files.fresnotreeservicecompany.com/uploads/1/3/0/7/130740609/tapipebijuradir_gezomo_gevej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7589/5447/files/73780788857.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/soxagipujosabemagegazaxet.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/16482071577.pdf
    • https://cdn.shopify.com/s/files/1/0434/6019/8557/files/tijukiradefag.pdf
    • https://cdn.shopify.com/s/files/1/0435/3038/7607/files/strategic_planning_framework.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/binuginopaxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/wilimumasogiranusolosol.pdf
    • https://cdn.shopify.com/s/files/1/0436/4923/7145/files/46831609099.pdf
    • https://cdn.shopify.com/s/files/1/0433/9403/9975/files/irs_form_8825.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/koxerale.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/barofebeposesesidewi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1590/files/banof.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d44.bin
aab5942c9c36e1c4d0353f1b99e81793ba3aba8e920859448fcbe83bf58d44d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D44 5056 bytes
font_01_sfnt_off00007e65.bin
04a4e213b6a0cafb0324a8943c2ed003db353a4319f21f42f88758be7345ddd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E65 11020 bytes

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