Malicious PDF — malware analysis report

Static analysis result for SHA-256 261beecb99a0cc35…

MALICIOUS

PDF

43.0 KB Created: 2020-08-14 03:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4583cc6cee44128dde0373f0fafd74ea SHA-1: c5c2eda68d1e5dcc43b60353eb98c197b1dfc653 SHA-256: 261beecb99a0cc35a2610b561cd65c5558893a80f5dae487d33d6c990a96a8ec
120 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, masquerading as educational content. One prominent link, 'https://ttraff.ru/pify?keyword=4th+grade+math+word+problems+worksheets+printable', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL, reinforcing the lure. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign documents.

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.ru/pify?keyword=4th+grade+math+word+problems+worksheets+printable
    • http://gogomudo.johnashcroftandcompany.com/uploads/1/3/0/8/130814526/c6a823c457ae.pdf
    • http://files.widpara.com/uploads/1/3/1/3/131380845/rivum.pdf
    • http://lofewave.our-perspective.com/uploads/1/3/0/9/130969440/3477845.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6454/files/pavapop.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/91019599456.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/valopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/klasifikasi_ceiba_pentandra.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/nimesov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6399/2742/files/84835233735.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/fowesiwidazaravawulobem.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/gezugawukuret.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/nafoxoxabiperenosetid.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/sadabok.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_off00006448.bin
326a4bc67e81a3bf08f73055d8083cc65a74adfd487e2ce05f78c999ab6fee96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 5664 bytes
font_01_sfnt_off0000777d.bin
a7022cae884ef54fbf9eb75dccb7539496d5fccde7bb1942c4fb4100d046d645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777D 11660 bytes

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