Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71eeb43f99330a5…

MALICIOUS

PDF

56.3 KB Created: 2020-07-30 17:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 586b11cbb569ad3ef7bb6d733cbfdeb3 SHA-1: 40f6634866d6b082452250630466b4590f6eaffb SHA-256: a71eeb43f99330a5fee2bae5da578acfbc61a4f493d9b09fbcec3e3c6f676645
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary link directing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains text related to 'Puntos de acupuntura para bajar de peso pdf', which is likely a lure.

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=puntos%20de%20acupuntura%20para%20bajar%20de%20peso%20pdf
    • http://files.littleandjuniormissbutler.org/uploads/1/3/2/7/132740511/c8d55f.pdf
    • http://files.outbackatpostoak.com/uploads/1/3/0/8/130874338/lafizevotup-sosepu-felajazufijijok.pdf
    • http://files.edmparging.ca/uploads/1/3/1/4/131406827/3307736.pdf
    • http://files.365downandout.com/uploads/1/3/0/9/130969710/rezegexavegepa-wufevelax.pdf
    • http://files.thierryrmontoya.com/uploads/1/3/1/3/131380337/jejal.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/56976857040.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/xorasafinim.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/rewelimiwuse.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8022/files/98090582808.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/mixinigozetirolajomino.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/tadojasetil.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/xewalijifudofimonale.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/sojujojozafozezotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/kimugubobedukikawojamepe.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_off00009bcd.bin
993dc9ec50299b0adc77c48fb5fd1d93955f8a2ef6ad8d92fb7b42955d796f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCD 5168 bytes
font_01_sfnt_off0000ad63.bin
dab0624c62a12bc874e09163e816c105f42a93c15247bbd65f02dbdb4ce47a42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD63 11316 bytes

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