Malicious PDF — malware analysis report

Static analysis result for SHA-256 db712f1bfbbf6729…

MALICIOUS

PDF

39.2 KB Created: 2020-08-08 23:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e8d82796a502173dbdf0354d48b9371 SHA-1: afbf2fc17ce5ca3a23068e011bae5400831920d4 SHA-256: db712f1bfbbf67298abb6badd3ae61cfd883b43e8fbaf55a64b34050113bd5b8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=the+adventures+of+sherlock+holmes+ebook+free+download+pdf'. This URL is designed to lure users into downloading content under the guise of a free ebook. The document body also contains numerous links to external PDFs, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=the+adventures+of+sherlock+holmes+ebook+free+download+pdf
    • http://files.grandmaceilshouse.com/uploads/1/3/1/4/131408529/92347f03614c5.pdf
    • http://sexutese.mdmedicalspaandwellnesscenter.com/uploads/1/3/0/7/130776177/kokipasixakonalovi.pdf
    • http://files.birthbydesigndoulas.com/uploads/1/3/2/7/132741241/lelavowi_metuvat_bopumube_fudobemobo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/96661370444.pdf
    • https://cdn.shopify.com/s/files/1/0446/5829/4937/files/argumento_abductivo.pdf
    • https://cdn.shopify.com/s/files/1/0440/3871/7605/files/55273387853.pdf
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/buxavorefilek.pdf
    • https://cdn.shopify.com/s/files/1/0433/8506/1541/files/xuwulimapid.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/72411265152.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/customer_acquisition_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/mini_cooper_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2105/7700/files/27146758285.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/dakiluwowivomugupoxera.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/50361150172.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_off000059e1.bin
cdae434c7285162cd680e9480d15f8d67b9922e2aed24285e0d2b3d5b2b9d880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E1 5700 bytes
font_01_sfnt_off00006d30.bin
2a777ab6615241b729f617f1e09861c30183d81285e2e5499ab86e5026e6ffcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D30 10120 bytes

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