Malicious PDF — malware analysis report

Static analysis result for SHA-256 391a185b0ecd6c15…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 02:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f67b15ac6d94a6a85b89bce8e0889e4 SHA-1: 024d76f1762572b94cc4b82e18be74cc78b191cf SHA-256: 391a185b0ecd6c155055116ec62de0c24e850d142d9bad8d8c1d346879689dd2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=chauthanh+info+anime, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure.

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=chauthanh+info+anime
    • http://jadivobaj.thesarahenni.com/uploads/1/3/1/4/131454165/gijogobominoratu.pdf
    • http://xuweta.southsiouxfallshomes.com/uploads/1/3/1/4/131407406/podawopux_kopotewilutaxo_dijaxivox.pdf
    • http://files.teenuniverse-california.com/uploads/1/3/1/8/131856852/komozosijuvexo-ligevesug-vefaxewuzudax-gusotup.pdf
    • http://files.vagabond.sk/uploads/1/3/1/0/131070146/febuju-bapavo-firagenifajubi.pdf
    • http://files.the-psi.org/uploads/1/3/0/8/130874477/b2849c65c76b.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/41865015891.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/dezirowemufefunafon.pdf
    • https://cdn.shopify.com/s/files/1/0438/5187/4466/files/jevoru.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/zijawafabijijovagobi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8584/6933/files/go_kart_go_ultra.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6662/files/e_bildirge_ifre_formu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/46045090027.pdf
    • https://cdn.shopify.com/s/files/1/0437/5537/2695/files/tozenuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/hyperlink_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/addison_wesley_math_makes_sense_6_answers.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_off00005b24.bin
f4292a1cce0a8b71b5fbd6563ea657d26145135f19fbc1f5e4cecf0c80d872d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B24 4604 bytes
font_01_sfnt_off00006aab.bin
f5e85b6f839325344e108ab04a6e50047cbdd889cfe046a720566f702438c9ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAB 15552 bytes

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