Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc9de7059685b01…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 19:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf07c2597753916bd489fd22b21a55df SHA-1: 696bb2a0b88fafaedee2bc75e0e9380ced450786 SHA-256: 8fc9de7059685b0118b7b77e7fc0acd0b88c4b80e6fcb6793dc0de1182c31f01
200 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with one prominent link pointing to a redirector that impersonates a Splashtop streamer download. This lure, combined with heuristics indicating a remote support tool lure and MFA harvesting, suggests the document aims to trick users into installing malicious software or providing credentials. The redirector URL is the highest priority IOC.

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=splashtop+streamer+android+apk
    • http://xapadag.tricountyliteracycouncilnj.org/uploads/1/3/0/7/130776757/83d822321f8a6.pdf
    • http://wotekis.ao-americas.com/uploads/1/3/1/6/131637136/xibugopon.pdf
    • http://files.erikabrincat.com/uploads/1/3/1/3/131383743/fijotibixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/wududevifanemenex.pdf
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/49408451001.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/paladomudes.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/dufasupikodokibofijibunew.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/descargar_libro_after_2_espaol_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/49376560498.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/56031117912.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/82614996669.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/93775778442.pdf
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/botw_windblight_ganon.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_off0000606d.bin
0616e78cb12bff1691621aa5fc8206e6819b3a91c4b631559ac9136947c71f3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x606D 5364 bytes
font_01_sfnt_off0000727b.bin
d24d278f6cf26900236e007d3e3635f7343b4dc5fa09ae20172bc33c71fc3bd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x727B 12876 bytes