Malicious PDF — malware analysis report

Static analysis result for SHA-256 df56ce93b658f76d…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 12:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9901b8c8cc28c6b7fa89584b2d8032ca SHA-1: 25669fbe1f5a8e25d1ca1137e773a89e0ab86ba8 SHA-256: df56ce93b658f76d4978a47dc4e66cf2b9d501ffa399eb440dcaeadcae4c8a47
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL for the malicious redirector. This suggests the primary purpose is to lure users to malicious infrastructure, potentially for further exploitation or phishing.

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/pify?keyword=cytokinesis+between+meiosis+1+and+2+forms
    • https://static.usrfiles.com/ugd/20d83a_fa8404bbffed4d2598df93865c2290fe.pdf
    • https://static.usrfiles.com/ugd/e5412a_c6032733af5b40b4af057a6a11562754.pdf
    • https://static.usrfiles.com/ugd/83d902_47a3a652645f4d7c9cfbaa0f28c66f57.pdf
    • https://static.usrfiles.com/ugd/eed56f_5159f66a4ea64943935e85a911dbd8cc.pdf
    • https://static.usrfiles.com/ugd/4aae87_95746396fa9042d6b305fce0677577f0.pdf
    • https://static.usrfiles.com/ugd/7ff653_e7772f4f6fbf420498a53e6958808981.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/21137893833.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/zezowemusuluzakuwobufezol.pdf
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/sample_product_costing_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6679/files/vajejepolomakemukuvejirug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/rekilanumevigora.pdf
    • https://static.usrfiles.com/ugd/03ae60_f991ae44de604eb2b0eb245ac4754e31.pdf
    • https://static.usrfiles.com/ugd/5e81b9_6ca30fc2bc4c4567ac80075de7816711.pdf
    • https://static.usrfiles.com/ugd/4b7290_6c81587b4c234cfaae890a9abc6c68c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad6d2c485c094095bf5fe1d150aad627.pdf
    • https://static.usrfiles.com/ugd/0dd040_465f88fd391d47e7a9f280170871829a.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_off0000758c.bin
43bc470d01a0d4ebefefdc619946ea72f57bb244131647eedd85832223a88a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758C 5508 bytes
font_01_sfnt_off00008852.bin
0d4e59019872ae3d6c90233c3502e2b20305a7a542cff6d3783e54e206937112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8852 10032 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.