Malicious PDF — malware analysis report

Static analysis result for SHA-256 e662501d206702eb…

MALICIOUS

PDF

52.8 KB Created: 2020-08-05 23:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c53792e8c6bbb16affa2bfdc7c16e934 SHA-1: 675a27dc99c900b24acd9609d4e125afe7b1a7ed SHA-256: e662501d206702eb48f1156f9c9ff11ef728f4b770e156143ec9813e16ca7ebc
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'marketing strategy types pdf' and a URL pointing to a redirector, suggesting a phishing or social engineering lure. The presence of a malicious redirector indicates an attempt to lead the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=marketing+strategy+types+pdf
    • http://files.thehoofhouse.com/uploads/1/3/2/8/132815807/rinowadowexalepolu.pdf
    • http://files.planningprotocol2.com/uploads/1/3/2/6/132682042/jotanufag-sivonajupi-jasowir-nexefupowudebu.pdf
    • http://fejuvukib.acromiguel.com/uploads/1/3/0/7/130775997/zomizovuzata-xivejopidar.pdf
    • http://files.starrystarryskies.com/uploads/1/3/2/7/132740623/09411a.pdf
    • http://tuloma.pdxfastpitch.com/uploads/1/3/0/7/130776262/7622181.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0428/4071/9516/files/fudodi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/ruxogeresesavazabudadev.pdf
    • https://cdn.shopify.com/s/files/1/0440/7905/5000/files/93191348295.pdf
    • https://cdn.shopify.com/s/files/1/0428/5458/0391/files/68784973861.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0725/files/35317050532.pdf
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/47326559000.pdf
    • https://cdn.shopify.com/s/files/1/0433/4275/8053/files/68380269291.pdf
    • https://cdn.shopify.com/s/files/1/0430/1147/3571/files/19054899230.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/voxexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/66418702130.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/vukusoguluzo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/36698519316.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_off00009090.bin
a484c891925a90e4dbfa547fd5156ef767085d48d2f21341f107a58af06f1b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9090 5348 bytes
font_01_sfnt_off0000a2eb.bin
5c6edc4c23a5d1ac8a0056b4a32b9abdae4b3acbcc784855af59ef12770e7cdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2EB 10236 bytes

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