Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4f8494fcff171c…

MALICIOUS

PDF

36.2 KB Created: 2020-09-08 04:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 286f3ffd669ceca257960bb82e7a4fa1 SHA-1: 2bd476668ebbcef3a118b92e34e3db5a8e0ef162 SHA-256: 5b4f8494fcff171c3887432bf4d7a4f56a79744a51fce0dd163a282f0f90e39f
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a URL associated with malicious redirector infrastructure, specifically mentioning 'teamviewer 12 filehippo' in the query parameters. This, combined with the 'Remote-support tool lure' heuristic, indicates an attempt to trick users into downloading potentially unwanted or malicious software. The document also hosts a large number of links to other PDFs on Shopify, suggesting a link farm for SEO manipulation or to obscure the primary malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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
  • 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.club/wix?keyword=teamviewer++12+filehippo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1629/8393/files/rotary_engine_parts.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/93279687981.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/26880862984.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/anatomy_of_primary_teeth.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/medicare_part_c_and_d_performance_data.pdf
    • https://cdn.shopify.com/s/files/1/0434/9893/0341/files/mueller_report_unredacted_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/6821/8780/files/power_hour_timer.pdf
    • https://cdn.shopify.com/s/files/1/0435/9235/1907/files/dovumaxokubiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/metoredagadimobipakekovi.pdf
    • https://static.usrfiles.com/ugd/c6ac46_7e33988ad95a408899fd6eace309b392.pdf
    • https://static.usrfiles.com/ugd/b8c837_d05f0c953a8b45b883990788c19958dd.pdf
    • https://static.usrfiles.com/ugd/296484_f21862f9f57b4c8481b631447b922b2d.pdf
    • https://static.usrfiles.com/ugd/9d66c7_c24a044b04af40b694b2fb034c957834.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_off00005179.bin
9373bf70f5d609b65d19db7027a912bac4e96c70a85e5715ce11841f9438bd7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5179 5248 bytes
font_01_sfnt_off00006345.bin
7967dd5e3b14e2bcffbe63224d6b691fd04f59ab3108b70f1d99121102604bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6345 9660 bytes

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