Malicious PDF — malware analysis report

Static analysis result for SHA-256 44052453be31ab0e…

MALICIOUS

PDF

43.8 KB Created: 2020-08-16 16:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f8f7e92ab03610c6ee985083e500c5b SHA-1: bd7dfe5f44de42b7451514d0c57ae0cb6b0c6c8f SHA-256: 44052453be31ab0eb846bb98471ca96ab69193594df1ee1d0cdb4e269c2e84b7
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 PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is used in conjunction with a 'fox tv guide' keyword. This suggests a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious. 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.cc/pify?keyword=fox+tv+guide
    • http://files.lochgoin.com/uploads/1/3/1/6/131607239/gutexal.pdf
    • http://files.nvlivestock.org/uploads/1/3/0/7/130775402/ddfb2240.pdf
    • http://xofozorot.tot.co.uk/uploads/1/3/2/7/132741593/ac3b599d1567f2c.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/fiwis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/47040508146.pdf
    • https://cdn.shopify.com/s/files/1/0428/9049/4119/files/21416934523.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/fiwatipebopato.pdf
    • https://cdn.shopify.com/s/files/1/0448/9651/8299/files/ravav.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/zirejutirezu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9842/1913/files/benewixebejitafebegivopex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/27549932981.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/woxazazapavonib.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/la_maquina_cultural_beatriz_sarlo_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/16289692763.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0057/files/55843320156.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_off00006f56.bin
4426b702000b0019a42050b88aa7a1144606270d8377682cc2b73a65c47a2319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F56 4560 bytes
font_01_sfnt_off00007f02.bin
a320d93089546cf494a2688058d01d385e20756dc9c117b9bc88a9b1c8c8ef3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F02 10572 bytes

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