Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d0cdc083254cda…

MALICIOUS

PDF

41.3 KB Created: 2020-08-12 23:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 210a1405d01e0dd7cff9fee9bb6961f9 SHA-1: f66acc8ac58a404cfac1f55369ec22d1512d4a2a SHA-256: e9d0cdc083254cdac32b87438cca76e4159ed092059970043cb0a65143c40aa6
130 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external sites, a common tactic for SEO poisoning and redirecting users to malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, contains text related to creating a MySQL database in WAMP server, likely a lure to disguise the malicious intent. The presence of numerous PDF links, including a link farm, suggests a campaign to distribute malicious content through SEO manipulation.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=how%20to%20create%20mysql%20database%20in%20wamp%20server%20pdf
    • http://files.msunorthfarm.org/uploads/1/3/0/8/130874162/990294c.pdf
    • http://files.kcmga.com/uploads/1/3/1/4/131410009/zilotal.pdf
    • http://files.sunshinejeremiahwolfe.com/uploads/1/3/2/6/132682040/9248942.pdf
    • http://files.gaddyshackranch.com/uploads/1/3/2/7/132712251/8763356.pdf
    • http://files.sawmlian.com/uploads/1/3/1/6/131607712/vutejepasaratoz_nikan.pdf
    • https://cdn.shopify.com/s/files/1/0440/7705/6165/files/xuvuwesejewobituxazimaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/addis_ababa_city_road_authority.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/15914197896.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2491/files/rebaleguferedibekig.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/397818077.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/maplelegends_bishop_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7014/files/83077715366.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/41236519013.pdf
    • https://cdn.shopify.com/s/files/1/0447/6325/0839/files/sign_in_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0173/2520/files/metabolomics_lecture.pdf
    • https://cdn.shopify.com/s/files/1/0433/9115/6380/files/luwige.pdf
    • https://cdn.shopify.com/s/files/1/0436/6155/7913/files/catalogo_de_cuentas_de_una_empresa_comercial.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_off0000613b.bin
0f131378ba883cfdbbd2279e42f4c3dd42b764111516a3fc3a89f397584ce139
pdf-font-stream PDF embedded font (sfnt) at offset 0x613B 5784 bytes
font_01_sfnt_off000074df.bin
777b08c5335b485b03f3225a18b5b452e9c155e39bdf3a9a9c5c3c848acbc36c
pdf-font-stream PDF embedded font (sfnt) at offset 0x74DF 10312 bytes