Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f52f17736f2fb3…

MALICIOUS

PDF

45.8 KB Created: 2020-08-02 01:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b156a15944f5be661a1308975210f22b SHA-1: 7d927bbc066715b9c20a1051b96c92a81d2e8c8b SHA-256: a3f52f17736f2fb3e977eb832bc433a4a16305144fbc025e31b98face3b509b2
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One prominent link leads to a redirector service, suggesting an attempt to obscure the ultimate destination or to track clicks. The presence of many links to PDF files hosted on various domains, including Shopify, indicates a broad distribution strategy. The ML classifier also flagged this PDF as malicious with high confidence.

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/pify?keyword=viva+pinata+guid
    • http://files.identitycrisisundone.org/uploads/1/3/1/8/131872149/rasoloma.pdf
    • http://files.yestoyouthgala.org/uploads/1/3/2/6/132696285/lumezakefiju.pdf
    • http://files.angryorange.org/uploads/1/3/0/7/130775677/vajidijutegeva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewobaropelizovijekozuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/9686909981.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/49385048896.pdf
    • https://cdn.shopify.com/s/files/1/0437/7470/5815/files/92794370528.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/degises.pdf
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/vuxeduvor.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/panijesik.pdf
    • https://cdn.shopify.com/s/files/1/0432/6260/7518/files/xidedijimonewivavolenopo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/91222213029.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.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_off00007901.bin
9bb23eb65710e594b69c7382ab4f506bd697f9d43ece447dc2cbc7f2e60d3421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 4844 bytes
font_01_sfnt_off0000899f.bin
0af6d9d6ae7bc83e53ef6cf1960be31a63d801f2918fad67c3aad2c75e6254ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x899F 9836 bytes

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