Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db4cf9d80998f43…

MALICIOUS

PDF

46.3 KB Created: 2020-09-06 18:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06de0313fc80f8015f2d868226954f48 SHA-1: 426d87cd6a4631f1e2eff6a041f80447a5fa89c6 SHA-256: 3db4cf9d80998f43ba31f2aaa498e91273abe4636dfedf1d1fbe937fffe28111
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=alapana+audio+songs'. It also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains the same suspicious URL. The primary attack pattern involves tricking the user into clicking the malicious link.

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.club/wix?keyword=alapana+audio+songs
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/17992356533.pdf
    • https://cdn.shopify.com/s/files/1/0440/5339/7654/files/48818720115.pdf
    • https://cdn.shopify.com/s/files/1/0438/4971/1781/files/cbse_examination_bye_laws_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/kurituge.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/80849344968.pdf
    • https://cdn.shopify.com/s/files/1/0436/9468/6376/files/3776481248.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/29201985104.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6534/files/the_arabic_language_its_role_in_history.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/danijikodanukonodakofuzi.pdf
    • https://cdn.shopify.com/s/files/1/0447/2838/5690/files/59071416968.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/venafuxuritasalibimibul.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/abn_amro_email_format.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd212668f901423aa76b47aee390d3c3.pdf
    • https://static.usrfiles.com/ugd/0789d5_513607b17b044ca89c3aada714fd947e.pdf
    • https://static.usrfiles.com/ugd/5cf23b_428bb2be918c49dc8551a8210d476cb6.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_off0000719f.bin
2fdae520ec9358e17a413852ea67cc408dde7dc3485b35144888d8fa735f9aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719F 5020 bytes
font_01_sfnt_off000082cb.bin
3273ab29df09f20cb2e48b6739d71f7d7dbf25c7ef3c7821ddcf9f03b5a0146c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CB 13228 bytes

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