Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dca9cde1fe83602…

MALICIOUS

PDF

44.5 KB Created: 2020-08-22 09:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a8a34ff4969798d281a1a7df1efb296 SHA-1: f15ad56827952f50275bc915751551e0bf6cbd02 SHA-256: 4dca9cde1fe8360247117a49777ad9cb978efb08836212c3bdad436f69b8dd17
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate that the document is designed as a link farm, likely for SEO manipulation or to distribute further malicious content. The presence of numerous links to external PDFs, including one pointing to `https://ttraff.cc/pify?keyword=contaminacion+por+microplasticos+pdf`, suggests a coordinated effort to drive traffic or compromise users through indirect means.

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=contaminacion+por+microplasticos+pdf
    • http://files.nativitybruins.org/uploads/1/3/0/9/130969057/kibeviviru.pdf
    • http://sozowo.atowncenter.org/uploads/1/3/1/6/131607063/3e3154ebe748.pdf
    • http://files.kristiekvuocolo.com/uploads/1/3/1/4/131407148/4932d.pdf
    • http://files.myhealthandwellnessmatters.net/uploads/1/3/1/4/131410545/ee69d1d78.pdf
    • http://files.midmittencrossfit.com/uploads/1/3/1/3/131384604/meresopon_luponimikil_zatigapow.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/xobusatefezesozasef.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/86511812459.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0262/files/central_dogma_of_protein_synthesis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/potuxiziriluz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/womaritan.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/figarel.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/lodubapumu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/nezevijuwexazejovesitiji.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/saudi_quran.pdf
    • https://cdn.shopify.com/s/files/1/0432/6260/7520/files/mewadigetokebu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/77002137244.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_off00006cc5.bin
2351ca84db70642d973235c9a4d698849c0cfd39cd700cbbc933768671793a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC5 5208 bytes
font_01_sfnt_off00007e51.bin
04b0852c935f114f00d3eaa935333dc796f285cd8a114756aa99eae0cb8ae541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E51 11328 bytes

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