Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93aac7b023e56f4…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 06:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d36720dca3e7e78db68063ab524c160c SHA-1: 60d9f81179f1cb9ab1ddd5efbe0ed4de0fcf2cd3 SHA-256: a93aac7b023e56f49ca03783111e4301663fd648344fb69f389ff313892874ce
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits a PDF SEO link farm, indicating a potential attempt to distribute malicious content through numerous links. The presence of urgency language further supports a phishing or social engineering attack vector. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/wix?keyword=evidence-based+practice+in+nursing+and+healthcare+third+edition
    • https://static.usrfiles.com/ugd/b11f6d_1cfaea2013df4bf3a9f4677a3b7c3d61.pdf
    • https://static.usrfiles.com/ugd/87a178_dcec080b082843469420e0b53c0e4cdd.pdf
    • https://static.usrfiles.com/ugd/895bef_932e251260cc4b4eb99f7e164ec0ebfb.pdf
    • https://static.usrfiles.com/ugd/b8c837_935f39ae9fc64dfdafd45904ef9bd08c.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2932/files/firewall_apk_root.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/pivivezevafazojer.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/13518017636.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/nudapuwalosipudatisajeze.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/2000_mg_metformin_pcos_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/rajubigijakezow.pdf
    • https://cdn.shopify.com/s/files/1/0432/4212/7527/files/93799079257.pdf
    • https://cdn.shopify.com/s/files/1/0445/2994/2687/files/92096114894.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/mathematics_solver_apk.pdf
    • https://cdn.shopify.com/s/files/1/0441/2270/1976/files/kesekub.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_off000067f3.bin
989492fa39f537cee781811e4b9358fff14f705ab9bb4e9b368660662f37b429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F3 5524 bytes
font_01_sfnt_off00007ab1.bin
ee6e2c27149d0921a6119d1b4c4c6d58d9ea5c62b012ce589aad41a572731ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB1 10584 bytes

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