Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a0e91d8993bf31…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 08:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a10032f7f7b1bb8af3ba7b18e5dd2137 SHA-1: c146920f4f0a219d65a26a3a1d9c3b5a8a130cdf SHA-256: 21a0e91d8993bf31ce9e6a2d283088f4954c0bb7d9d6ba88eb2987da69201d87
150 Risk Score

Malware Insights

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

The PDF file contains embedded links that are designed to redirect users to malicious websites, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a 'Honeywell oil filled heater manual', which is likely a lure. The primary malicious IOC is the redirector URL, which is designed to lead users 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/wix?keyword=honeywell+oil+filled+heater+manual
    • https://cdn.shopify.com/s/files/1/0432/3577/0532/files/sodiwelowuluwewolewud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/75640113886.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/beethoven_moonlight_sonata_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/0755/8310/files/70502022327.pdf
    • https://static.usrfiles.com/ugd/b8c837_b54a9d3abc9d49a990bfec7a8d823e08.pdf
    • https://static.usrfiles.com/ugd/de02f3_a420bb3aaae441d5b36490f66f772fce.pdf
    • https://static.usrfiles.com/ugd/b8c837_e849912209f04ee8b3916722d17836b9.pdf
    • https://static.usrfiles.com/ugd/34e21e_fb412117b94a42eeb09118c2008c0874.pdf
    • https://static.usrfiles.com/ugd/b8c837_c158ba2cfbc04189b35daf60ae48f1cc.pdf
    • https://static.usrfiles.com/ugd/2c8d66_1565951dee0a4d0695853d4bb88275ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a1fd688a48d43e8ad10a5f922838a34.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/lapesidexulijagof.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6904/files/ketesebedogo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7577/8198/files/one_word_substitution_in_english_with_marathi_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/77277925148.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_off000067da.bin
c6d752beca8732a6c41c6d75663d27f816c4dfc104dee3df6ed52366989efd3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DA 5124 bytes
font_01_sfnt_off0000792b.bin
04aa93c526684cf586dbf70451793c1478144c39334bbca37f52a039e7c98656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792B 10096 bytes

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