Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e90fe8791e5098d…

MALICIOUS

PDF

54.5 KB Created: 2020-09-16 16:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c6f62a6a3e14e803fdef8c3f13ecf4 SHA-1: 3c51e341ce9706bb9a871132379ca7f73d912f26 SHA-256: 2e90fe8791e5098d059ed1a98f6a34cd3a877d923312db21717499e632234821
150 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, pointing to 'ttraff.me'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to lure users to a malicious site.

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.me/wix?keyword=pioneer+avic-6000nex+installation+manual
    • https://cdn.shopify.com/s/files/1/0438/9391/5800/files/representative_payee_accounting_report_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/49313724789.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/cooking_guide_for_boneless_leg_of_lamb.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8041/files/kezufub.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/zedekukivezomegiropogep.pdf
    • https://2da9dcb8-9e6e-4622-898c-105837280d26.filesusr.com/ugd/9ea91e_8076590b78cc4ca3a9493a086043b0a6.pdf?index=true
    • https://21f9ec8d-664c-48bc-b94c-6c8197f0387a.filesusr.com/ugd/7be1cd_99eba783a84242708e24e747ac21a5e1.pdf?index=true
    • https://172bad75-d2d3-4635-8f93-22ba5fe03795.filesusr.com/ugd/b56239_eea668ca3d614986bc83f833f3b2695c.pdf?index=true
    • https://6e3faa45-a423-480a-a50f-b1ed98fbdd8e.filesusr.com/ugd/e643da_70d80d78b58f48dabbc0959979cc2c3c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/84537903953.pdf
    • https://cdn.shopify.com/s/files/1/0461/3675/4329/files/durable_power_of_attorney_form_missouri_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6428/files/dojuna.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/mainstays_tv_cart_assembly_instructions.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_off00008bb9.bin
b63bc16ecdb0ed33b6ae83ef3a9c2e5c57aa5010c575644787956cf64d3680d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB9 5400 bytes
font_01_sfnt_off00009e12.bin
7fd857b3f4c42e1dba7d9a172a57642ff63b6c1749e6a196ceca4a32c494443e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E12 15020 bytes

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