Malicious PDF — malware analysis report

Static analysis result for SHA-256 62206d23d8ff7df7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 21:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c3966a5246f5b0535c8e0d4c8985e47 SHA-1: 5461574b54ffb033676f69d534b8df2f5bc2e521 SHA-256: 62206d23d8ff7df75fcfd849f981b850d744b5c5582b221a45cf9c3eb613ecdf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lure users to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=the+answer+my+friend+tradu%25C3%25A7%25C3%25A3o
    • http://jujilol.lloydcooks.com/uploads/1/3/1/4/131453005/fexizokusatarivad.pdf
    • http://files.thomasmechanicaldesign.com/uploads/1/3/1/4/131409309/wikunevigewa_desofelowojojut_zipefedixexo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/allowances_exempt_from_income_tax_u_s_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/xavupuminalegosavuvod.pdf
    • https://cdn.shopify.com/s/files/1/0439/4565/6488/files/lakere.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/zeluwenazovoverinum.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/61526983683.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/nujute.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/how_do_you_install_minecraft_forge.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/43379374014.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/xarimole.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/narorekire.pdf
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/6679077537.pdf
    • https://cdn.shopify.com/s/files/1/0437/8594/5246/files/lobar_functions_of_brain.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3d.bin
741fb496c7e7b8bd86d8a91fd154f65817738e34049146d4272eff3762357726		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3D 5756 bytes
font_01_sfnt_off00006f1d.bin
1f584647c9c80262788abb4d45d47e359e12c1771b298fbfcb5e61cf8d37030d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 10092 bytes

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