Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3e6ba7c2cb6a3e…

MALICIOUS

PDF

39.1 KB Created: 2020-08-21 22:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bceaf38a5570071745191577f7823b17 SHA-1: cf45321bd71c2b467fc84f5d97a1a36eb0a59ef8 SHA-256: ab3e6ba7c2cb6a3e7e26efc6e91607e70a837f3ad1c1afce74822a6aadeed8cd
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed to link to external content, likely for SEO manipulation or to distribute further malicious payloads. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of malicious intent.

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=daytimer+page+template
    • http://files.rippintimber.com/uploads/1/3/1/0/131071209/bipesomo.pdf
    • http://vuwutiril.accesseuropetour.com/uploads/1/3/0/8/130874284/6130819.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/17339418655.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/1477215816.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3073/files/zupivoxakomoxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/bhakthi_geethalu_songs.pdf
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/fillable_rate_confirmation.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/71001135121.pdf
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/boswellia_serrata_monograph.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/56825186093.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/57099727611.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/chemistry_in_everyday_life_notes_for_neet.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_off00005d56.bin
ba4bed55cd971057d678b1792d7d66b005495233b1a9e60dcabaad19577e651c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D56 5060 bytes
font_01_sfnt_off00006e85.bin
e198cf4bdb10767475cc3ae24ebbaba327ee19008a2a2bbcd1e4a5d6370a1969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E85 9840 bytes

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