Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3ddc36857a5049…

MALICIOUS

PDF

48.9 KB Created: 2020-09-07 15:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b259ab019474090df0adceefff5707b SHA-1: 904d8037df841819dc3f0e5130e44e05b245417e SHA-256: bd3ddc36857a50498f5b52a3558adaa0b3e819dd346c27a86305369853fa776d
120 Risk Score

Malware Insights

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

The PDF file contains a deceptive document body masquerading as a product manual, which includes a link to a known malicious redirector. The heuristic firings confirm that the PDF contains a malicious redirector link and a link farm designed for SEO manipulation. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack.

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=avantree+wireless+headphones+manual
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/84618623546.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3493/files/icse_full_form_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/8228511632.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0463/3939/1644/files/duxegixapabaxox.pdf
    • https://cdn.shopify.com/s/files/1/0432/6791/5936/files/negative_about_school_uniforms.pdf
    • https://cdn.shopify.com/s/files/1/0440/8311/8232/files/54516435086.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/92750726833.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/sotadazureve.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/basic_topology_armstrong_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/bodibumumazabagexinajeka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/65511028556.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/27028514601.pdf
    • https://cdn.shopify.com/s/files/1/0451/0197/3657/files/bernt_oksendal_stochastic_differential_equations.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/jopoxijeluxivarok.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_off0000816f.bin
810920fd7de93e38fba3e9a5f80ed9656557b285def3409c2750c94a6c2b19ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816F 5340 bytes
font_01_sfnt_off00009384.bin
fb728a1f13e8bfcfba9f3b1c84930fb9299b35d8afcc057f3d254250e4e484a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9384 10100 bytes

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