Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fbf20fd2419992…

MALICIOUS

PDF

43.9 KB Created: 2020-09-01 07:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f11a297aeab94554426a2348ace52cb SHA-1: 7c0cccceaf8ba5e0a30945c0cf2684e9697b59c2 SHA-256: 26fbf20fd2419992f58ced0478cd4c885f261154ea48798f668a71c68d7b92e9
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to benign Shopify-hosted PDFs, but one critical link directs to a known malicious redirector at 'https://ttraff.cc/wix?keyword=hatchery+management+guide+cobb'. This suggests the document is designed to lure users to malicious infrastructure under the guise of providing a management guide. No scripts were extracted, and the document body was heavily obfuscated.

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=hatchery+management+guide+cobb
    • https://cdn.shopify.com/s/files/1/0431/1046/5698/files/63621606562.pdf
    • https://cdn.shopify.com/s/files/1/0441/2529/0648/files/renitov.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/38643846191.pdf
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/css_vertical_line.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/47243532195.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0c90cec36e9447080397cc238479b82.pdf
    • https://static.usrfiles.com/ugd/aa14a9_ea3810f4b356423da57138de9f4201ea.pdf
    • https://static.usrfiles.com/ugd/87a178_27c97bd262e943078f0c2c237aa0f1c2.pdf
    • https://static.usrfiles.com/ugd/ca300b_9b29c9653dd9494a92264aa1b9f92402.pdf
    • https://static.usrfiles.com/ugd/5b9a87_09de0b9cf3404a81bc66964da08ec276.pdf
    • https://static.usrfiles.com/ugd/b6edda_2c7186f986044b01b14dbeac058d0b00.pdf
    • https://static.usrfiles.com/ugd/b0b521_b7c223f4371e4ce89737736a4a33dbc9.pdf
    • https://static.usrfiles.com/ugd/cafc24_7cc84883fcaf4359b5938e0904c85937.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/amino_acid_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/aquaculture_project.pdf
    • https://cdn.shopify.com/s/files/1/0440/8636/2264/files/25502590854.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/marathi_nimantran_patrika_format_download.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_off00006b54.bin
e494caec5a3c699e8a32b2767f520d3dda423fd380b1adb12566236a7903b478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B54 5344 bytes
font_01_sfnt_off00007d5a.bin
c2fc0ba20607ae055832d457c89fcdaa50528018c138d8f579b918159764d328		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5A 10428 bytes

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