Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce85d29719717f38…

MALICIOUS

PDF

60.0 KB Created: 2020-08-10 00:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b637ac243bd273398f63eb72e0bfb0d5 SHA-1: 3a038bfd3f6dd7f179f36b1ad17588c1cf81b677 SHA-256: ce85d29719717f380ee9c45d6cabce6fa7fd0780e65935578abedc6431d960a1
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This indicates the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=cuidados+de+enfermeria+en+atonia+uterina+pdf
    • http://saxepizaf.medlock5150.com/uploads/1/3/1/4/131438641/danuzit-sabisonixum-ravipuputixij-wekadoko.pdf
    • http://files.dsccstandish.org/uploads/1/3/0/7/130776001/1851537.pdf
    • http://javodifo.thegodmotherdesigns.co.uk/uploads/1/3/1/4/131482976/4657869.pdf
    • http://files.goldengatecyclists.org/uploads/1/3/0/7/130739155/sozabubakudov.pdf
    • http://files.dsccstandish.o
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/zedekewiwaruvesaxug.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/ruzid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/curva_de_altura_uterina.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/vusuginometotixotab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bugos.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/73688852753.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/44115354347.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/51709789522.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/91649850870.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/16321368484.pdf
    • https://cdn.shopify.com/s/files/1/0437/4695/1319/files/41071351398.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/9120750222.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/68686444536.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_off0000aa85.bin
d977a1b19a5cac63263b48192c05033999d4e99231ab2ab4fdd663d86a5b2c14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA85 5060 bytes
font_01_sfnt_off0000bba0.bin
ec364337cc320f32579d5620370892876e68e30985f768d1006a467b7a6b05c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA0 11484 bytes

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