Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c8284d578706b2…

MALICIOUS

PDF

37.5 KB Created: 2020-08-28 13:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eef5b0fe6e40c6f3c4daa6ce9c7c2f32 SHA-1: 5967c4710fe1aabfb1ed5ca7dbea4f85d21a7edb SHA-256: 17c8284d578706b29c5b3fb6fe4c6a733d6f02e69e3863f692f8e4394aac928d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, likely for SEO manipulation or to host further malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly indicate an attempt to lead the user to a malicious 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.com/pify?keyword=the+first+book+of+adam+and+eve+pdf+download
    • http://files.eaglendt.services/uploads/1/3/1/4/131453255/lujuzeretute_ravovigufeg_majudofuxeg_nemexum.pdf
    • http://files.saluspdx.com/uploads/1/3/1/0/131070161/sazodijujetinupo.pdf
    • http://konas.africaspectrum.com/uploads/1/3/0/8/130873995/2340728.pdf
    • http://files.mrlucero.com/uploads/1/3/1/4/131453097/kituferosaka-pekuvivalu-lukijerupep.pdf
    • http://files.shanewilcoxartist.com/uploads/1/3/1/0/131070581/1162321.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9570/3204/files/39780843780.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6695/files/estadistica_descriptiva_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/cambridge_practice_test_for_pet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1718/files/39091912304.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/78812154976.pdf
    • https://cdn.shopify.com/s/files/1/0448/1184/5793/files/air_compressor_inlet_guide_vane.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2954/files/lubalenexasepiwizapewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/dhl_shipment_airway_bill.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/infographic_presentation_templates_free.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005394.bin
cda497b03ba0ce1dafa525b395d310cab6d0afa583e074c312a234db04afc5ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5394 5584 bytes
font_01_sfnt_off00006678.bin
c64b03301669922aae14ce0a7b8aff6e40d95a6c003b331aead6025ef6b6b5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6678 10064 bytes

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