Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5505eb3409963bc…

MALICIOUS

PDF

47.4 KB Created: 2020-08-30 08:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ee11e6adab858d3d07ed15328dd644 SHA-1: f1383b3109f814609869548c72ca764d7a22b3e0 SHA-256: f5505eb3409963bcd9a545b0d6cec913e9cf2a72efdfab5171a7d3d4d82013c1
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/wix?keyword=transformers+coloring+pages'. Another heuristic indicates a PDF link farm, with the dominant host being 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect users to malicious infrastructure under the guise of providing coloring pages.

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/wix?keyword=transformers+coloring+pages
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/53404684086.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/practice_exams_wastewater_treatment_operator_certification.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/jojoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/vanilla_twilight_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/34599642345.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/sindrome_de_abstinencia_a_la_cafeina.pdf
    • https://cdn.shopify.com/s/files/1/0435/8704/3496/files/jigofivo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0210/8836/files/73270427190.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/10018647781.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/91945252496.pdf
    • https://cdn.shopify.com/s/files/1/0434/0429/6348/files/bifefowoluzejelalijutadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/16393966819.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/4604623528.pdf
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/80271557468.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_off00007c90.bin
163667cb52bffb2e427e971a6daa61aa34b187f3794a58dbe127b59b51a69454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C90 5284 bytes
font_01_sfnt_off00008e72.bin
c035bbbd36633348e31c968cb473e1bd94be43ede0f56d585ea50db402ebd4c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E72 9956 bytes

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