Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e6391d2c9f7b31…

MALICIOUS

PDF

35.1 KB Created: 2020-09-04 19:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ecb5b0b0b845f125154e70e32064d03 SHA-1: 94d507f6870c74d3dea11de86dd660bf9e0cb74d SHA-256: 37e6391d2c9f7b31d14e02e002db90bf17f1d24c1ee795b266f740d6bf18cfdd
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely intended to lead the user to a malicious site. The document also contains a large number of embedded links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.me/wix?keyword=tatiana+manaois+helplessly+video
    • https://cdn.shopify.com/s/files/1/0433/1313/5774/files/lifimefaxaweliravozus.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/68736457287.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/a_rocking_horse_winner.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7055/files/mulimezujimipuwobeberaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0917/0856/files/36152161353.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9845/files/convert_word_table_to_excel_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9821/files/free_printable_hundreds_tens_and_ones_worksheets.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6e2d46d0e454a4c8ba63f7b806c40a2.pdf
    • https://static.usrfiles.com/ugd/e5412a_d65a785c68024eac9ae019bb009041ae.pdf
    • https://static.usrfiles.com/ugd/97634b_3454d8773f264f11a88af737bb0ee16d.pdf
    • https://static.usrfiles.com/ugd/5ad03d_be6b5f1a4ef041698171e5bde4aa2c41.pdf
    • https://static.usrfiles.com/ugd/dcbeda_a5a8cbbf996445989bf4cd0ff7303b8c.pdf
    • https://static.usrfiles.com/ugd/b30cf0_b3e79c3980354d3c9697859a43c64ad5.pdf
    • https://static.usrfiles.com/ugd/4dded2_67d1b1f50b7841cf86f1fa816772aff4.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_off00004c8e.bin
109653b8fdf1cab31162b67b94540d93df13ecc60185fa8264d8d14ee97803b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8E 5212 bytes
font_01_sfnt_off00005e35.bin
1090471baf4098f9ef1ff7680344593afa9395978a1f4858267a452073fed393		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E35 9812 bytes

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