Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5783dc18fe5e3c1…

MALICIOUS

PDF

42.0 KB Created: 2020-08-17 11:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 463ff7162d4730a6533f3416bbc20a40 SHA-1: 7106f59f50471401beb635235358983c736976fe SHA-256: f5783dc18fe5e3c14118e7a9baca96cd9f33039974588cce49659530d07750df
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a PDF link farm. One of the primary links directs to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body is heavily obfuscated and contains what appears to be junk data, further suggesting malicious intent rather than legitimate content.

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=api+performance+testing+using+python
    • http://files.ms890.org/uploads/1/3/1/3/131380263/kepexukulof.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/crime_statistics_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/tosaxakajolonojosemeniki.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/64252445540.pdf
    • https://cdn.shopify.com/s/files/1/0437/9118/8117/files/sumel.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/free_magazine_download_sites.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/vovetuvudewesotudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/tasopebusifaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9777/files/misexumoruma.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/prova_auditor_fiscal_do_trabalho_2013.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_off00006439.bin
c8e4f4b3136b8297d236a00bcb364c1b2cf1ddfeee4bcd04e209726478769815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 5488 bytes
font_01_sfnt_off000076bc.bin
9c418b31f96c04f8a24b8082cf8ac42c8d91baba3f05f13af4c474280380c569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BC 10900 bytes

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