Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff26e8e956e36955…

MALICIOUS

PDF

34.3 KB Created: 2020-08-22 11:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9be639b50544763dd4b30fe6264358ab SHA-1: def175b3ed2193f33f6e750b5ab075a3e4768018 SHA-256: ff26e8e956e3695568a522451255a88bbc3c7ca1b86720abbc49b90284db70ba
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to Shopify domains hosting benign PDF files. However, one critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious content. The presence of multiple unknown URLs further supports this. No scripts were extracted from this sample.

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=english+test+for+grade+1+with+answers
    • http://rojil.castaiclakedragonboat.com/uploads/1/3/0/8/130813364/xazikema.pdf
    • http://files.bewellacupunctureclinic.com/uploads/1/3/2/7/132740277/digefide.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/hogan_s_alley_paintball.pdf
    • https://cdn.shopify.com/s/files/1/0436/1568/2717/files/arduino_string_split.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/agree_three_verb_forms.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/83935724281.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/nilevefasafod.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/sugodobetibaba.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/chiari_malformation_prognosis_after_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/48367739711.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_off00004652.bin
e90b64c83ca805998b903714687e01f4f87c10605c1c3437c08583f45259fb51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4652 5272 bytes
font_01_sfnt_off0000584f.bin
d2a4c415a7b28efaf9cc054fd4ed2ef5e1d8a09a8fbc7fb13503994ace194639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584F 10240 bytes

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