Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b384fc84e7538f7…

MALICIOUS

PDF

52.2 KB Created: 2020-07-30 05:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b4f6ec94ee7a7c04001b206da7161ec SHA-1: 3f757eccc851e962edbe9e0eaff79ba333b6a0e1 SHA-256: 7b384fc84e7538f77d4f8f0518554b50a33e96c76091ea6dd65cde7b1effa552
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents. The primary malicious IOC is the redirector URL, which likely leads to a phishing page or malware download.

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=basic+algebraic+equations+pdf
    • http://files.edgewaterfitnesscenter.com/uploads/1/3/1/3/131383943/5374111.pdf
    • http://files.b-khairbooks.com/uploads/1/3/1/4/131413718/e8a5aabf5452e.pdf
    • http://files.givingclosetproject.org/uploads/1/3/2/7/132712006/nubowa-woragumib-setilan-kavinuf.pdf
    • http://files.mhcs.me/uploads/1/3/1/4/131411539/basipesuji_bolukibeju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3157/files/rafusopibabilape.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/mibuxemewod.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/xusosif.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8032/files/56936443891.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/46623120960.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/27149036335.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/85051631592.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/229905594.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/43475179606.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/
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079ae.bin
2d5f449deefaa39377567ee7e35decf5503d95f48ef04a21451078b5c1c440c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AE 5520 bytes
font_01_sfnt_off00008c66.bin
452670c388e169e8d8410393bb9668e82af5a851b7733057f5d740f66226ca44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C66 10012 bytes
font_02_sfnt_off0000ae92.bin
9b6ad5722d12b30ebaf898f562fd4d85af749794f3aca0f1f676e444c262175b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE92 16088 bytes

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