Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9c46ec0937913f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-25 13:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84318f4ea0a7755ad53a04f20a43702b SHA-1: 57e0a611a4a52685d23603da744689d02c8bac39 SHA-256: ab9c46ec0937913f9b85bc7d5d0cfc3976e55e4c7357af4e6764b50802c789b8
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, disguised as a free browser download. The document also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on 'cdn.shopify.com'. The primary malicious link is the most critical IOC, as it leads to known malicious infrastructure.

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=mozilla+firefox+pc+browser+free
    • http://dasomex.wheteach.org/uploads/1/3/1/3/131380598/7775880.pdf
    • http://files.serenitysalonandspallc.com/uploads/1/3/1/4/131437561/kowupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2262/2621/files/spin_bowling_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0430/8975/6311/files/zukopamejibujovuguledifu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/famonimukisizodutovezof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/accidentes_laborales_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9065/files/wuzatigot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/aleph_borges_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/bexelubunavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/nasofewonerugirutak.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/wbcs_optional_math_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/56474286275.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.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_off00006407.bin
4561f956bda33faac7aa65f9bdac811a3972a8b57f8a91e71825511044635e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 5364 bytes
font_01_sfnt_off00007677.bin
7cb89736061aae4a13c6e707852958b4d00f15f0b87c7c223acb6f432e1a6e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7677 10208 bytes

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