Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb8d5ba9f10b65d…

MALICIOUS

PDF

39.7 KB Created: 2020-08-26 21:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 667120f3dbb1c3ab94f9fb12f66a9412 SHA-1: b7a008680f0971675cf25ec5bb0ddc817c0c1e56 SHA-256: 8eb8d5ba9f10b65d6498b2e4925a635095852c028365fcdd5bf260379e76eea2
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to malicious infrastructure, disguised as a 'Fall risk assessment tool'. The document body and heuristics indicate a link farm strategy, with multiple embedded links pointing to various PDF files, likely to manipulate search engine results or host further malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.me/pify?keyword=fall+risk+assessment+tool+canada
    • http://wugapimis.decoratorssale.co.uk/uploads/1/3/2/7/132740264/cb42ff.pdf
    • http://files.alltechclimate.ca/uploads/1/3/1/8/131871994/3683960.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/sumifakepoxutonezulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/xokaduw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/86989932137.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/xitijerex.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/adobe_creator_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/ryzen_ram_overclocking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/8393/7432/files/crisis_del_canal_de_suez.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/lebefom.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/zetazifoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/suburban_rv_furnace_troubleshooting.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_off00005d5e.bin
6b0136264dcfec286c521f01814bcb716dee7621d2261f023679224a21be21f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5E 5104 bytes
font_01_sfnt_off00006e9d.bin
3ccfa599f3cea1910a6ae6381522ba65e682b5f90f5b139daabaa092b5c10bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9D 10404 bytes

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