Malicious PDF — malware analysis report

Static analysis result for SHA-256 354a41de11c367d6…

MALICIOUS

PDF

46.6 KB Created: 2020-07-24 17:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c9c8771efac985517c26a110d547fe7 SHA-1: a0c97ae4d57b614528f6012539aa4a94526036ba SHA-256: 354a41de11c367d6ae6f5236fb37cbeb1ca43d6ad657b2eff10286a4fd76da71
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=a+great+big+world+younger', which is flagged as a malicious redirector. The document body is heavily obfuscated and appears to be largely junk data, but the presence of numerous links suggests a social engineering or redirection attack.

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=a+great+big+world+younger
    • http://files.wren-project.com/uploads/1/3/1/4/131407547/nexufemel.pdf
    • http://files.towardharmonywithnature.org/uploads/1/3/2/7/132710782/tujisulamalerum-latejufirori.pdf
    • http://files.sincerelythecraft.com/uploads/1/3/1/4/131406202/994971.pdf
    • http://files.milkywayenglishretrievers.com/uploads/1/3/1/4/131483254/futisasoviwavi.pdf
    • http://files.nessasnotes.com/uploads/1/3/0/7/130738924/16bd308df095.pdf
    • http://files.nessasnotes.com/uploads/1/3/0/7/130738924/16bd308df
    • https://cdn.shopify.com/s/files/1/0431/9723/5363/files/goboropaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/62265307179.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8318/files/67077311416.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/86919202940.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/79360198818.pdf
    • https://cdn.shopify.com/s/files/1/0436/2128/6050/files/dubor.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/xofopoxovukotodefiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4677/files/poxujufojasujulitu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/nejibomimawotitimilusidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/zerulonorimumol.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_off0000782f.bin
13d9b43ad92014fffd478a9e8f81005fc6ccb4036ef1efa4ed1da6c229ecbcf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782F 5020 bytes
font_01_sfnt_off0000895a.bin
c0c593e4cb14c512a273e85613e7b1b20f05ba023ead1e0757478a6f0b88f8f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895A 10552 bytes

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