Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0597a300b56cf3…

MALICIOUS

PDF

38.1 KB Created: 2020-08-17 09:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a45736bd6991173e7e4f264a3e592de3 SHA-1: d7c36b90f2f8d76d0a1c038e4e61b79150f5f39c SHA-256: eb0597a300b56cf3aee8f90957e887453e343c8fae38010cf149a53fba67f275
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though corrupted, appears to reference 'Autodesk inventor tutorials pdf free', suggesting a lure to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.cc/pify?keyword=autodesk+inventor+tutorials+pdf+free
    • http://begeju.enamelpainting.co.uk/uploads/1/3/1/1/131164243/kisowutubimosolibidi.pdf
    • http://files.grindcoretogo.com/uploads/1/3/2/6/132681378/misiwa.pdf
    • http://files.upperwharfedalechurches.org/uploads/1/3/1/3/131398334/sawegefowi-puxelom-gukaxuv-xiwuxuzate.pdf
    • http://mezatemo.teacherontheroad.com/uploads/1/3/1/3/131383737/4485235.pdf
    • http://files.jacobspolitics.com/uploads/1/3/1/4/131483148/xafujuvunakajab.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/81092912664.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/java_jdk_6_linux.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/tegebi.pdf
    • https://cdn.shopify.com/s/files/1/0451/1626/0517/files/71786664921.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/89547545600.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/47555487593.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/kunaputuwigowopu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/16984666129.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/ludetutafusos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/solid_phenolic_sheet_material.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/74581900941.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_off00005768.bin
d7cd441bcec7795443197344d125fb874fc8af4ee23c69d4e0bd71cf4ff97c85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5768 5148 bytes
font_01_sfnt_off000068fd.bin
3005aec536062e576f483b46eef2bda0d042c1632cb55165b8017c2dd1065c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FD 10096 bytes

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