Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f25f86655936840…

MALICIOUS

PDF

47.7 KB Created: 2020-07-30 07:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d07733a0bc94a5e49637eb644fe1827 SHA-1: 72d5ccf7f80ef8a9ad9db4510c81b8e959f8c568 SHA-256: 2f25f866559368400e1c5f546ad7ee60c4c131a0fced5cdbcbc9f60bddb2d8ca
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one critical heuristic firing indicating it links to known malicious redirector infrastructure. Another critical heuristic identifies it as a PDF link farm, suggesting an attempt to manipulate search engine results or lure users to malicious sites. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

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/pify?keyword=burhanuddin+muhtadi+pdf
    • http://files.muriellindsay.com/uploads/1/3/1/4/131407549/sabikujo.pdf
    • http://files.andersonlawkenosha.com/uploads/1/3/0/7/130739713/d67699c503c397.pdf
    • http://files.markwhunter.net/uploads/1/3/2/7/132741181/1064226.pdf
    • http://files.cobbdaylily.com/uploads/1/3/1/4/131406258/wudevu_gimolebefunuz_fowefirefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40814320730.pdf
    • https://cdn.shopify.com/s/files/1/0436/2226/9090/files/19372206385.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/3096305996.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/10901771809.pdf
    • https://cdn.shopify.com/s/files/1/0440/2642/9605/files/funomotonadomakalu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8506/1541/files/jubinezodipilegati.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/fatuzovutimomenibeku.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2445/files/sesalaxegobufupasuxipuzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/12471477899.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/
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/3096305996

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007366.bin
8392b87a17d86c84e34c0b6ac7a1c4963d620efbab1555df56eda5a6effe3f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7366 4776 bytes
font_01_sfnt_off00008364.bin
d8f660c4efd101fc8caec83f5a5a35d5e8b54d7a9ec37c67c49ba0c2d508d026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8364 15156 bytes

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