Malicious PDF — malware analysis report

Static analysis result for SHA-256 90532470aa85d260…

MALICIOUS

PDF

48.1 KB Created: 2020-07-31 19:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01ec96006c9c533e4b7cade99093ed24 SHA-1: 5722c8a5028467715e21c1938a224d3a229d419c SHA-256: 90532470aa85d260cb39444e060a9f6d0bc8bf525e4e8e275743fbbdbd87b128
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic firing indicates a link to known malicious redirector infrastructure at `https://ttraff.cc/wb?keyword=titre%20de%20voyage%20pour%20r%C3%A9sident%20permanent%20pdf`. The document body, though partially corrupted, contains text related to travel documents and the wkhtmltopdf tool, suggesting a lure for users seeking specific information.

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/wb?keyword=titre%20de%20voyage%20pour%20r%C3%A9sident%20permanent%20pdf
    • http://files.emmadurkanmusic.co.uk/uploads/1/3/0/7/130776218/5045663.pdf
    • http://files.mbarchitectureanddesign.com/uploads/1/3/0/8/130814346/6205249.pdf
    • http://files.mx.thomasmadden.org/uploads/1/3/1/4/131437457/kavituvavotugaz_babefuda.pdf
    • http://files.yanktonfamilyvisitation.org/uploads/1/3/1/0/131070651/gabelogomozogotosoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/2116/3941/files/novinenenak.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/55893541859.pdf
    • https://cdn.shopify.com/s/files/1/0436/6611/2662/files/33825894243.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/xurevuxupabima.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/76234766860.pdf
    • https://cdn.shopify.com/s/files/1/0435/0191/2224/files/fuxigif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/74828050335.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/5168204003.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9721/0532/files/65895357028.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/kuxotebesogewewupol.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/fererunazunevasuzajede.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/65908581733.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/64539311695.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_off000077ba.bin
79da6a1aba7b81a1c425b0faed3e9c998aad640bbd88985b6b704e496f8165ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x77BA 5580 bytes
font_01_sfnt_off00008a70.bin
2f208cfc63afa92a76781a009d9fd4e6ae5da12b1678395308b876b5ab1acb6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A70 12172 bytes