Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7363f216ef18436…

MALICIOUS

PDF

42.5 KB Created: 2020-08-10 07:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae3834777089c62708b0258273bededa SHA-1: d420cc4747180c05d22508694c78235afb2fd3c9 SHA-256: c7363f216ef18436be4820022fb5b3ace5335923647f2da781884522c5925e79
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. The primary redirector link is https://ttraff.ru/pify?keyword=abandoned+farmhouse+poem+pdf, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify and other domains, many of which are benign but likely serve to obscure the malicious intent. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=abandoned+farmhouse+poem+pdf
    • http://files.ecoagronomy.org/uploads/1/3/1/3/131384575/fivariduvonaba.pdf
    • http://fimut.guerrillazoo.com/uploads/1/3/2/3/132302780/fasonudeliveb.pdf
    • http://files.floatingstonewoodworks.net/uploads/1/3/1/4/131438843/kozubevozexexapip.pdf
    • http://files.stillnessandchangeacupuncture.com/uploads/1/3/2/6/132681352/8dae7.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/jufobiwojiguxokojofera.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/black_swan_full_movie_dailymotion.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/42460845417.pdf
    • https://cdn.shopify.com/s/files/1/0439/0325/4683/files/necchi_sewing_machine_parts.pdf
    • https://cdn.shopify.com/s/files/1/0440/2823/1830/files/fitbit_manual_charge_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tolipokegegami.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/dracula_untold_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/20360368785.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/buxoxevotot.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_off000069c0.bin
e2f6aa1a07ab451b33720677a2b9dc5af7860be2edcaf7379b3971ddde899fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 5376 bytes
font_01_sfnt_off00007bde.bin
e22d82db88cec7371e6f85f1bf523e5261f406fa604b2bad8f8004033dbe2a03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDE 9852 bytes

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