Malicious PDF — malware analysis report

Static analysis result for SHA-256 5857920ffa255f6c…

MALICIOUS

PDF

52.0 KB Created: 2020-07-30 21:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beec580a567b64b6ee9940e9d8062391 SHA-1: 4d824fce592e35a30e5af80b623d97bf2659b559 SHA-256: 5857920ffa255f6c5027e90f77139747110ffb1a5635fabf41035dbbf5ab806e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links to external websites, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Stanner power amplifier pdf', suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads 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.com/pify?keyword=stanner+power+amplifier+pdf
    • http://files.letphilosophyshine.com/uploads/1/3/2/3/132302733/9843578.pdf
    • http://files.myprovidenceconstruction.com/uploads/1/3/0/7/130738993/b3a14aee0a2de7.pdf
    • http://files.halloweeninthehills.com/uploads/1/3/1/1/131163851/tazagaralut.pdf
    • http://files.louthbeekeeping.com/uploads/1/3/1/3/131398195/kadadoponi.pdf
    • http://files.theportlandtowingcompany.com/uploads/1/3/2/3/132303353/fajor_gojerogitid.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/65071940498.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/rokejonovowikesu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5240/8742/files/pajoditobunazokapiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/56425575868.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/40168653563.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2119/files/jojowaxoximikakeze.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4823/files/ranob.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/pavuxudisitijaxoxevej.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/gajoborigamozerowelopijaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/vofedikusozotejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4070/files/berumigalazajoburisavini.pdf
    • https://cdn.shopify.com/s/files/1/0435/5761/7823/files/vizosusejexorikuvara.pdf
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/sekesa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.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_off00008ea9.bin
152605662134b503e4eec3264cae0549fda99e237a6f954ac322566c01fd4e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA9 4992 bytes
font_01_sfnt_off00009f8c.bin
255f5040f5e1afa2e719c250c3d3720ada74554c1b9d074f947626d96ba97264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8C 10208 bytes

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