Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cfe0e008f48d18…

MALICIOUS

PDF

68.2 KB Created: 2020-08-07 14:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3df31fdbf5005a431cf8abdfcd7bf0f SHA-1: cc2f4213cf594e12f54243c121be5ce42f6fa76e SHA-256: 97cfe0e008f48d183180af39b4eeb4e8e2576e9b1e361cc2c8ce7cf24d5d4d33
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for phishing or to download further payloads. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=spencer+kagan+cooperative+learning+pdf
    • http://files.redinwinter.com/uploads/1/3/1/8/131856380/3207286.pdf
    • http://files.nwcilegacyproject.com/uploads/1/3/0/7/130739213/gepija.pdf
    • http://files.tilefo.com.au/uploads/1/3/0/8/130814588/xinaladow.pdf
    • http://files.amberalysson.com/uploads/1/3/1/0/131070678/0f929af100393.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/dodedebamolubimaregijudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/4925357725.pdf
    • https://cdn.shopify.com/s/files/1/0432/7260/1756/files/34310503371.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/skyrim_se_script_cleaner.pdf
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/the_arrangers_of_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/9248179925.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5339/files/74042019641.pdf
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/27930327609.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/bleach_complete_series_download_english_dub.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/46539969892.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/figiwejedere.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/80431534632.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_off0000ccd4.bin
08862608614b4d3255dfa79d0863a97ac9defec8af2e60ca5ad17491bd690dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD4 5372 bytes
font_01_sfnt_off0000df3b.bin
855b311046c550f9a781df4a0ae97ae44ebb722c5bce3c4fca3cdd190354593f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 10628 bytes

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