Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bff35bf1c54d36…

MALICIOUS

PDF

47.9 KB Created: 2020-09-03 22:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d79cdefa22847816860b2774466d07c1 SHA-1: 02c55b151c66e957fd2f4e914c40438d57059dbe SHA-256: 65bff35bf1c54d361ceb06d36b54a2fcea818567fe05354a5dcaef964144ac80
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file identified as malicious by multiple heuristics, including a critical alert for a malicious redirector link. The document body contains a URL that is also flagged as a malicious redirector. This indicates the primary purpose is to lure the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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/wix?keyword=achyutam+keshavam++songs.+pk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3b7182_35a790871308483d83a0b700cd567ab4.pdf
    • https://static.usrfiles.com/ugd/01bc73_5027af15b7c6438788c2a6f97411d491.pdf
    • https://static.usrfiles.com/ugd/ecd213_f31ce2d3244448c99d1924821c1b78c0.pdf
    • https://static.usrfiles.com/ugd/cacfd7_305225d6249a41bb9071b6ac93657e82.pdf
    • https://static.usrfiles.com/ugd/b8c837_f57d45ea83db45508d26d71f8f92f58c.pdf
    • https://static.usrfiles.com/ugd/36f25b_71dce12f15114b6690505bc51e4b3bbb.pdf
    • https://static.usrfiles.com/ugd/8e1900_1595125bd63041ab81e4fc4ede50fbfd.pdf
    • https://static.usrfiles.com/ugd/03ae60_8b8c1e169520421a851383c970d05b79.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87678197609.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/bollywood_songs_video_new.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e88.bin
fcb89319f58811f841df38ad8a9b61000200b7212bb22bc4797376e9be5b3201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E88 5464 bytes
font_01_sfnt_off0000911a.bin
ae66d902fad6ce09e1f70d7cd4a255c0e3c95b236067fd9c0222abd65daa41fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x911A 13612 bytes

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