Malicious PDF — malware analysis report

Static analysis result for SHA-256 20cdfb14afdf8438…

MALICIOUS

PDF

38.0 KB Created: 2020-08-23 22:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b9874e0e28601f97834d856fec16311 SHA-1: 3c6304ad6aacba194c3fea10f1d7a51a94112420 SHA-256: 20cdfb14afdf84388943508d651332fa031f3c8e4c4ebbed8e8fc2e7d2b11fc1
120 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to a known malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text and embedded links suggest a lure related to 'Bugatti wallpaper for android', which is likely a pretext to encourage clicking the malicious link. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting the malicious intent of redirecting users.

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.cc/pify?keyword=bugatti+wallpaper+for+android
    • http://files.eldridgechurchofchrist.com/uploads/1/3/1/4/131406527/d281edcfce2360.pdf
    • http://giterevu.lobemadesigns.com/uploads/1/3/0/7/130775478/vakodopoxat.pdf
    • https://cdn.shopify.com/s/files/1/0432/8597/1110/files/cerita_rakyat_malin_kundang.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/facebook_sdk_android_login.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/2812795171.pdf
    • https://cdn.shopify.com/s/files/1/0440/7748/2136/files/basic_information_about_gst_return.pdf
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/hd_wallpapers_1080p_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4294/files/blackroll_bungen_rcken.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/bavave.pdf
    • https://cdn.shopify.com/s/files/1/0434/6570/3590/files/15864481623.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/jenejifusozaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/template_literals_in_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/71680977654.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/74107585012.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/77399613321.pdf
    • https://cdn.shopify.com/s/files/1/0433/0917/0856/files/pekuruzulafisuworuz.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_off00004e6a.bin
a38f9ecfacfa92714ec7a7000c3924bc6d9d7ebfb739f8a59d9bf88a6f67c81b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E6A 5172 bytes
font_01_sfnt_off00006029.bin
f75d3e870f21c4b975fa56bec0abedf9e0d03b3a76f0fa294c26aac168aea962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6029 13912 bytes

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