Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c57cccc3e0a62ed…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 23:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7a26de8ce19c3afa705e0f0a3dea555 SHA-1: de4722378f63cede6b4e99673791b0b98757b55a SHA-256: 8c57cccc3e0a62edd9c761fdd66afcf593efc9b41db091e80330f3a78a2a35d1
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute the malicious PDF. No scripts were extracted, but the presence of the malicious redirector and the ML classification strongly indicate a phishing or redirection attempt.

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=date+format+rpgle
    • http://files.hurrybackcatering.com/uploads/1/3/0/7/130776225/dufitanal_xurevosow.pdf
    • http://files.drawingtolearn.com.au/uploads/1/3/0/7/130776104/vugawujejimaxil.pdf
    • http://zutoru.spokanehomeprep.com/uploads/1/3/0/7/130776485/8614953.pdf
    • http://pasivofe.animclass.org/uploads/1/3/2/6/132683209/fajikowov.pdf
    • https://cdn.shopify.com/s/files/1/0435/0912/1184/files/analytical_mechanics_by_hand_and_finch_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/geolocation_app_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/abrsm_piano_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/duxuniwegodusag.pdf
    • https://cdn.shopify.com/s/files/1/0436/4815/5806/files/benihana_orlando_menu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/jetorepemolabibironuza.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/22069744413.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/21430454540.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/70127741371.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/68581403135.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_off00006b20.bin
c3ba46dbb77d6e1508885bb9b3436caab4c30a73a552b0d7d3e48225f1948a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B20 5040 bytes
font_01_sfnt_off00007c3d.bin
ad5d8f5786202306242543a309e73c867e11006dcb7c5c4f5e1c182f1132183d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3D 10700 bytes

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