Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9f370d3b67e181…

MALICIOUS

PDF

50.1 KB Created: 2020-08-05 09:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d6b0cadeaf35553a57248e4360857c9 SHA-1: 04d8dc0e33ae275f16082cc09185fb0fe989e6cd SHA-256: 4d9f370d3b67e18178e65ba471b0a4ec82badb69176d7ccc84a92fe5e17a0263
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=asme+sec+viii+div+1+pdf, which is likely used to redirect users to further malicious content.

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=asme+sec+viii+div+1+pdf
    • http://files.universalironworksusa.com/uploads/1/3/0/7/130738955/tegupajo.pdf
    • http://files.ramimargron.com/uploads/1/3/1/6/131608016/6054857.pdf
    • http://files.ctk.net/uploads/1/3/2/8/132814119/7759718.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/12185235416.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zexula.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/juborujubuzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/1777428201.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/husqvarna_chainsaw_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5365/2895/files/stewart_essential_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0434/2910/1735/files/github_git_bash.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/nikakefexixojapodoxa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/45250516120.pdf
    • https://cdn.shopify.com/s/files/1/0433/6618/7176/files/application_for_amazing_race.pdf
    • https://cdn.shopify.com/s/files/1/0434/7461/6472/files/getewovutixurepovumadita.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/velad.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_off000087d3.bin
1c43fc6bf8e36cb53879ca4881e2355891906b9e80f035e228847dc410de69e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D3 5064 bytes
font_01_sfnt_off00009915.bin
50aace1780689eddaf282d98bc9e2eebcc788726bc410ec6bd688df29629be9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9915 10228 bytes

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