Malicious PDF — malware analysis report

Static analysis result for SHA-256 7922e441d08dc7aa…

MALICIOUS

PDF

35.4 KB Created: 2020-08-25 16:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d933951f2234f1782602a7c4660bd6d SHA-1: 23d23e88f3b5ad797884f060beddf693f7a843be SHA-256: 7922e441d08dc7aa6e8f5c191c88f543b183abda04b9529bf1f807aad4323afa
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely intended to manipulate search engine results or distribute further malicious content. The primary malicious IOC is the redirector URL.

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=christmas+images++for+mobile
    • http://files.norforkschools.org/uploads/1/3/0/7/130738836/17cd82.pdf
    • http://files.monstersandmuchmore.com/uploads/1/3/1/4/131408432/8839502.pdf
    • http://files.mybrightdelights.com/uploads/1/3/1/4/131483317/5c5e3e7b38eeea5.pdf
    • http://binalom.vinoetamicis.com/uploads/1/3/1/4/131406821/1425fc6c8d4.pdf
    • http://files.lowercreekcreations.com/uploads/1/3/1/4/131452887/1962873.pdf
    • https://cdn.shopify.com/s/files/1/0443/9549/5590/files/exploring_social_psychology_myers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9652/2398/files/atriplex_plante_mdicinale.pdf
    • https://cdn.shopify.com/s/files/1/0441/4518/0824/files/coldplay_the_scientist_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9539/2409/files/australian_super_performance_september_2018.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/97353638868.pdf
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/bodmas_questions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/combine_two_arrays_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/sodapafejidurimisagi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/95457054700.pdf
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/28792791014.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_off00004ce2.bin
97610a1cfe9a4c42b184249652fca2628a0b75f1fe50ef453598747464fccf9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE2 5228 bytes
font_01_sfnt_off00005e88.bin
b85b47371f1132512258d5597b858fcfa1d4cdcace6ff11b52356396317bf37e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E88 10116 bytes

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