Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4614743ad92e4e…

MALICIOUS

PDF

52.2 KB Created: 2020-08-06 14:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3262c0a03bf798ced0e0034cb50098 SHA-1: 26d6bc9805ad373dba513641794a62de050f0bd1 SHA-256: 1d4614743ad92e4e9e964f03ffa4f8519fa41c81cba9516738d6489c3b9f4370
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure. The presence of a link farm and a malicious redirector suggests an attempt to lead the user to a malicious site, likely for malware delivery or credential harvesting.

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.com/wb?keyword=elide%20fire%20extinguisher%20ball%20pdf
    • http://files.newdayforthetao.com/uploads/1/3/0/9/130969192/375fe0ecad8957.pdf
    • http://files.hiarea4.com/uploads/1/3/2/8/132814427/9977d77539f3d.pdf
    • http://files.musecafeco.com/uploads/1/3/0/7/130740571/8745239.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/jipumozod.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0166/files/lawilirafegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/litupom.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/17653586063.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/syllable_structure_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2860/files/95074852111.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/gmat_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/preveno_de_riscos_ambientais.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/5451198960.pdf
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/46434042127.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/dabiveka.pdf
    • https://cdn.shopify.com/s/files/1/0434/8064/5782/files/92898381432.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080eb.bin
1b63c32e90c50e6652b84e18618a558e4c7696fc0fd559b35442b15f438bd3b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80EB 5240 bytes
font_01_sfnt_off000092ac.bin
2bbd316da97b4788ca687a700f04dcd047ad30a106f6beda8b12de7d9339a4a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92AC 10340 bytes
font_02_sfnt_off0000b5fd.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FD 4324 bytes

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