Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc02df90e36722e1…

MALICIOUS

PDF

38.8 KB Created: 2020-08-06 23:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3dd4807de0b74438d3e909cc00ada4a SHA-1: 4061abb10aec27169bc36897c2df3e3d2c16dc25 SHA-256: fc02df90e36722e12e9ac964872ccfcadeeb876a71b78504a544ba11925db5ae
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the primary links directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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.ru/wb?keyword=2d%20shape%20properties%20worksheet%20year%205
    • http://files.orientalvenus.com/uploads/1/3/0/7/130739210/7385294.pdf
    • http://files.phelpsmastergardeners.org/uploads/1/3/2/7/132740900/woloterivelalovu.pdf
    • http://files.sapphiredobermans.com/uploads/1/3/0/7/130775867/7128023.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/dimudelusotuxona.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/paluvotedixubobodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/coleman_powermate_5000_parts.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/agroforestry_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/mortal_kombat_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/1291713684.pdf
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/kusefepazotire.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/rukel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/losezevux.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/84520794608.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/18114466567.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/34783623353.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_off00005968.bin
ce5e177582f7998f807e1da24c7b2d97d2b4d7c6717ce799e01498b4551b3c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5968 5436 bytes
font_01_sfnt_off00006bf7.bin
0706221356e13660b5e669934b7a6de3d09734c48774665d4dd9c92d0d5c1abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF7 10132 bytes

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