Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c84cc3ace4010ba…

MALICIOUS

PDF

63.6 KB Created: 2020-08-13 01:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434c1ddf4578c45695148bea21cd5f38 SHA-1: d8bad7be0c304622f38e31c7b64efcc0829f41f3 SHA-256: 4c84cc3ace4010ba2cf60518c54dba2e8cbe8eedb7a7a7b76d3959f8445b7614
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains text that appears to be a title for a grammar practice book, suggesting a social engineering pretext. The presence of a link farm heuristic further indicates an attempt to distribute malicious content through numerous links.

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=storytown+grammar+practice+book+grade+3+pdf
    • http://files.jeffbrawn.com/uploads/1/3/0/7/130739945/1a587e.pdf
    • http://gafot.nsnaloxone.com/uploads/1/3/0/8/130813528/xipet-kidegavejofo-vatir-bimirafo.pdf
    • http://files.mrdavolatech.com/uploads/1/3/1/8/131872295/6725142.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/64691240058.pdf
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/actuarial_mathematics_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0431/4592/0669/files/fuzixixuviz.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/53693752893.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/how_to_screen_share_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/2086/9019/files/88844339429.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/pixie_where_is_my_mind_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6050/files/puzidigemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/attestation_d_accueil_formulaire.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7757/files/bennett_s_cardiac_arrhythmias.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/12176460689.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/91058827624.pdf
    • https://cdn.shopify.com/s/files/1/0433/0533/6985/files/nonprofit_bylaws_template.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_off0000b6d3.bin
99771a62789d27de8d90cbcbcc22b8895f9313ea7c7fcd28ea1866235e609c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D3 5928 bytes
font_01_sfnt_off0000cafe.bin
d6b25869097dcfc0842dbcf99fb68d4dc3baa1cd9c64b8eca45ccc4c8bfe4c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFE 11052 bytes

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