Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ff97d7f09077e2…

MALICIOUS

PDF

44.9 KB Created: 2020-08-29 18:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a73f0c5e0d14073ddbe8515c4e8278e1 SHA-1: c08246288d0f8920998b020ec6aa33bc5c0fff40 SHA-256: f0ff97d7f09077e2068477cc9790466b46cebd127483e25b759deead747161f3
150 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 'https://ttraff.cc/wix?keyword=ate%2525C5%25259Ften+g%2525C3%2525B6mlek+soru+ve+cevaplar%2525C4%2525B1'. This URL is embedded within the document body, disguised as content related to 'questions and answers'. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm for SEO poisoning or traffic redirection. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=ate%2525C5%25259Ften+g%2525C3%2525B6mlek+soru+ve+cevaplar%2525C4%2525B1
    • https://static.usrfiles.com/ugd/dfb5f8_190c4dd61e904396a97f1329ded6b8e4.pdf
    • https://static.usrfiles.com/ugd/4dd980_9718a341a0c04db9a6542a996e0d0622.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8cb9ea401404c31bd09e45a5a2ed76b.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/42319808311.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/gavokefugefiditafisif.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/34736905719.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/xasenelomevixano.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7256/files/xamugutofegetuge.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/21853830984.pdf
    • https://cdn.shopify.com/s/files/1/0459/2658/0375/files/wodidoxobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.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_off00006d0b.bin
9ea5a35f1121c733aea59d2d29216dd5d53de7db9ece59b377722d4f7fb7c87f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0B 5784 bytes
font_01_sfnt_off00007fea.bin
cdf16db0de593c4cbc731736e3bf8b6542b759f559a7fba4788806c6538ea3a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEA 12124 bytes

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