Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d185f0b27b92000…

MALICIOUS

PDF

33.1 KB Created: 2020-08-23 15:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b487248f3c90a3996d9d5814d03dfb98 SHA-1: fcb59a26b91ca74782ddd127b3b2e308f0543405 SHA-256: 3d185f0b27b920003f621a648d9f2bacfb1c1a577aab81ee8d8640758480196f
150 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple embedded URLs, including a known malicious redirector at 'https://ttraff.com/pify?keyword=cancionero+pascua+joven+2018+pdf'. The document body, though partially obfuscated, also contains this URL, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links points to a link farm attack pattern.

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=cancionero+pascua+joven+2018+pdf
    • http://files.chesssaveslives.com/uploads/1/3/1/3/131381044/gonerigogalo-nujugob-tobazetofomuful.pdf
    • http://files.swanleeartdesign.com/uploads/1/3/1/4/131437615/1872905.pdf
    • https://cdn.shopify.com/s/files/1/0457/3734/5180/files/18944224546.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/contending_forces.pdf
    • https://cdn.shopify.com/s/files/1/0430/9083/7655/files/belle_de_jour_full_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/validity_and_reliability_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0429/2630/9543/files/23972235505.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/kexitakozasixi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4414/1218/files/definition_of_student_motivation.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7614/files/47497246100.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/67493563843.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_off0000413d.bin
31b5658aab3c7b4a9d78076dae430ed2c70c18c27af0145ce7d5f9065359f25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x413D 5680 bytes
font_01_sfnt_off000054aa.bin
342d3fc7cccdb3f4f66f5ca7ac9b4902345d7363828c5d7292e68cf1b7806d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AA 10304 bytes

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