Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d4a61d93060f63…

MALICIOUS

PDF

39.7 KB Created: 2020-08-10 18:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e734e9d6491ccb3cc7528f11b853554 SHA-1: c3bcc1f8c0a5a2e8a049b8dd566b2733b66103ce SHA-256: f2d4a61d93060f637e10c1c0052f4463f4096d818a3906ce08caee1ecccdf908
152 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 at 'ttraff.com'. The document body, though obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of a link farm and a critical ML classification further support malicious intent. The primary attack pattern involves redirecting users to potentially harmful content.

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=presentation+skills+pdf+file
    • http://files.mapexpng.com/uploads/1/3/0/8/130814459/1861842.pdf
    • http://muturixo.acornequalityfund.org/uploads/1/3/0/7/130775350/9ecd845.pdf
    • http://files.hungtaolin.com/uploads/1/3/1/3/131398129/6605772.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/70344310992.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9766/files/98308341625.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5554/files/ruxokof.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/icyveins_unholy_dk.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/append_to_csv_file_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/35306975828.pdf
    • https://cdn.shopify.com/s/files/1/0432/8855/9782/files/ashrae_90._1_si.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/problem_solving_download.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_off00005e2f.bin
89f06f4f82ecffa55b3c712f2a2aeb2517b8f9b42dd5417bb2afb260b737f464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2F 5100 bytes
font_01_sfnt_off00006f90.bin
ba76cb364369bbfaa11dae247593424a6a5f6e3c290bb597acaa62090abeacc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F90 10060 bytes

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