Malicious PDF — malware analysis report

Static analysis result for SHA-256 30dbf48fcc1db708…

MALICIOUS

PDF

46.4 KB Created: 2020-09-18 15:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0278dade27b31871a30a3b995fb205cb SHA-1: 3443a99010346fcecc4b26a6133763dbd8a2820a SHA-256: 30dbf48fcc1db7089d2eb7983aacae37d7f936a9f9d85cfbd73f031c7974a31a
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically disguised as an 'IR spectroscopy practice worksheet'. The primary malicious URL identified is https://ttraff.club/wix?keyword=ir+spectroscopy+practice+worksheet. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a phishing or redirection scheme.

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=ir+spectroscopy+practice+worksheet
    • http://files.gsmhlaw.net/uploads/1/3/2/6/132681836/22c5e85f299da1.pdf
    • http://files.ridgewaywilts.com/uploads/1/3/0/7/130775939/37dbd316966b6dd.pdf
    • http://nezef.americanhealthservices.org/uploads/1/3/1/4/131438775/dd144c635aa9f.pdf
    • http://butamad.biblethought.net/uploads/1/3/1/6/131607240/fekozofu.pdf
    • http://tebuf.simplyyounutrition.com/uploads/1/3/0/7/130776407/9507057.pdf
    • http://lesojak.thefestivalband.com/uploads/1/3/0/9/130969746/8551315.pdf
    • http://panurip.practicalperspectives.com/uploads/1/3/2/6/132681237/tigubakowopaj.pdf
    • http://zokokowit.zenwich.us/uploads/1/3/0/9/130969754/tepipuliredulusab.pdf
    • http://files.yaffabeautybyrica.com/uploads/1/3/2/6/132695663/wawevetiwovax.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/86501652454.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/80157308148.pdf
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/kimifitobozuxamilamiv.pdf
    • https://242b1b86-d481-440c-95e8-22fda7f0d8e1.filesusr.com/ugd/145364_a53b5022b53a4ed99c162c01a6420c5e.pdf?index=true
    • https://0d758161-e1d4-4560-a359-6af0d6072024.filesusr.com/ugd/81d6a4_a088eaac55cd4c2ca9d43e73e58061ed.pdf?index=true
    • 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_off00007824.bin
9b6a7cae344162389df65b8f6f9ce8a296ccc45ad2e806e99707822f2df35bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7824 5184 bytes
font_01_sfnt_off000089dc.bin
0e6c57a93086af744b71b59cfe5e92adb5f810ddb999679c07984ee42585c593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DC 10224 bytes

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