Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aef5cf8d378c5cd…

MALICIOUS

PDF

43.4 KB Created: 2020-08-01 23:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3eec3ff92fe3cc552fa2563e65f5f23 SHA-1: 8a42282f9698599d17bf2a29529608eddedf6a9d SHA-256: 3aef5cf8d378c5cd2f51864e34c7acdb97cecf5651ea24014e005eca6c26a1b3
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify-hosted PDFs, designed to appear as legitimate content. One prominent link, 'https://ttraff.com/pify?keyword=bolding+in+discord', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and link farm indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=bolding+in+discord
    • http://files.nomnomgelato.com.au/uploads/1/3/1/3/131379343/gamiwosanijaz-rorenen-davimeboj-jajanadivojise.pdf
    • http://files.capetowndaytours.net/uploads/1/3/0/8/130874629/bugob-bowon-jozopo-vudux.pdf
    • http://files.freedomheroesusahealingsanctuary.com/uploads/1/3/1/6/131607005/retutiretezese_gezani_weronobedetuxo_xarozo.pdf
    • http://files.mfgconsultinginc.com/uploads/1/3/0/7/130738859/132022.pdf
    • http://files.sneakernebula.com/uploads/1/3/2/3/132303351/navixopesudat.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/dusatowidujifemitipagufiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/gonekimalunat.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/litupom.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/qualcomm_atheros_ar956x_wireless_network_adapter.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/44707611726.pdf
    • https://cdn.shopify.com/s/files/1/0434/9332/7008/files/wejukepuwomun.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/wudimojewejusunugatevola.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/77022960654.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0435/8841/9741/files/39153267634.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/vanuxijubotusudosokisaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/55252267877.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2689/files/57003456960.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/beruramala.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_off00006c63.bin
51b3c8f74871017ed27c54cad7246362334c7f222577bd25479cd03b8fc2d86c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C63 4948 bytes
font_01_sfnt_off00007d4d.bin
e0d2402c39c95eabf3ea8d3c285fbef46a764105c04c72bd5083748c39e06335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4D 10208 bytes

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