Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a3bc642b75516b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-18 18:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f8d1388857fdb71a50bef85cfaf0fe6 SHA-1: 5de8a468ee33e27b0963386f29947e63d25b7807 SHA-256: 52a3bc642b75516bc49108e339b92bb70913dfb310472a9ec0c703cefb2ec64f
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, identified as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=draenor+garrison+building+guide', is flagged as a malicious redirector. The document's content appears to be a lure, with the embedded links designed to redirect users to potentially harmful sites. No scripts were extracted from this sample.

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.ru/pify?keyword=draenor+garrison+building+guide
    • http://files.drstephenho.com/uploads/1/3/0/8/130874672/niwakewajimonad.pdf
    • http://files.exeter-gog.net/uploads/1/3/0/8/130874655/3616696.pdf
    • https://cdn.shopify.com/s/files/1/0430/7786/1527/files/child_and_adolescent_development_summary.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/70692094542.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/38798421039.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/jonubesovijopurazafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/sekazazemapimowa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/cub_cadet_src_621.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/70668417869.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/proyecto_de_investigacion_unam.pdf
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/cholecalciferol_vitamin_d3_davis.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_off000072e9.bin
ea6a4b361a6d6116c631ed4cb32eda45fb95fd5ec07655acbea5b46a9c359dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E9 5132 bytes
font_01_sfnt_off00008461.bin
d4506450c16d73e0d64185f5fd015ef5c2e3a9574309d0e9197683fa59a64ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8461 9860 bytes

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