Malicious PDF — malware analysis report

Static analysis result for SHA-256 542378b8358b15bc…

MALICIOUS

PDF

47.6 KB Created: 2020-08-30 13:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fea518625f193b38400690d211a14a36 SHA-1: b4c835edd27d0bd3bf39c1c0fb42e775d1a524f9 SHA-256: 542378b8358b15bcfd6717514ee84995c22790939f2acf37599094fd760e7348
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO spam and phishing. One of these links, 'https://ttraff.ru/wix?keyword=circle+of+fifths+guitar+fretboard+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and other benign-looking PDF links, suggesting a lure to a malicious site. No scripts were extracted, limiting the analysis of direct payload execution.

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=circle+of+fifths+guitar+fretboard+pdf
    • https://static.usrfiles.com/ugd/63d3ad_18edbe14cb1d4d1d875ef199c3cb0744.pdf
    • https://static.usrfiles.com/ugd/a107db_27f8f8b6a2104152991181a417d442eb.pdf
    • https://static.usrfiles.com/ugd/0779a3_fdc80be1f49442b0bb4229598eaed9e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_9204ea580f5f44c6bc5d9c83bcc08aba.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_2515a8975e824fceb4de8ed1d704d558.pdf
    • https://static.usrfiles.com/ugd/a86d68_7ad242bc0d264d6bba24fb06a6ec3383.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/39692467140.pdf
    • https://cdn.shopify.com/s/files/1/0463/6891/5617/files/24256159155.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/japumuketirowufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nowivozepax.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/moviebox_ios_10_no_jailbreak.pdf
    • https://static.usrfiles.com/ugd/b8c837_79db1b3cedb34562867ac8531568f8aa.pdf
    • https://static.usrfiles.com/ugd/d902bb_db950e1da0e94eb29aff4f98b1eb696d.pdf
    • https://static.usrfiles.com/ugd/c3f88d_66e23624b3854950a5e918108dbf7b4b.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_off00007cc9.bin
f2d169b4ee5bff73bf4de68c270f1e848f4f2619be3f016a83688526a6c42378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC9 5464 bytes
font_01_sfnt_off00008f42.bin
2e5421b8e3954c00e64e098d75c8ecd984beda39b920ca271b4d248f5956270f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F42 10028 bytes

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