Malicious PDF — malware analysis report

Static analysis result for SHA-256 8938547bcbd510d9…

MALICIOUS

PDF

32.6 KB Created: 2020-09-20 03:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78f877d49e4152a56a261378122ac349 SHA-1: 29532b6ca66adae3b4d9c10252f6a6fa5b7a32e0 SHA-256: 8938547bcbd510d9a3c86ec31b871389768f46f40eaae5417dea91f1e6a282e9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One prominent URL, 'https://ttraff.club/wix?keyword=evolution+unit+review+worksheet+answer+key', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to an 'Evolution unit review worksheet answer key', indicating a lure to entice users to click the malicious link.

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=evolution+unit+review+worksheet+answer+key
    • http://pazenume.bmemf.org.uk/uploads/1/3/0/8/130813786/5461073.pdf
    • http://sibem.denaelovelifestyle.com/uploads/1/3/0/7/130739347/vavoselasupabelovore.pdf
    • http://taxafax.mattresslandnb.com/uploads/1/3/0/7/130740066/sumedemofevuw.pdf
    • http://files.twigtravel.com/uploads/1/3/2/8/132814468/nuwino_pasosele_zusawitis.pdf
    • https://2fadf7ef-2801-4eb5-b59d-fce8257a2680.filesusr.com/ugd/33c377_2624d4f0b885428abcd77263a406402b.pdf?index=true
    • https://42e1a8be-24fd-4302-ad79-d0d799bc444d.filesusr.com/ugd/8b97dd_ea777d60d9134264be5d233dc85dce85.pdf?index=true
    • https://1c85ff48-5206-433c-a985-a5e1cba79788.filesusr.com/ugd/23b571_6c7ca51a379a4bd78568587623b30dc0.pdf?index=true
    • https://ea6031e5-10f9-4e5e-8739-9d606332a058.filesusr.com/ugd/5f4192_468a3e338ef54c8ebdbc7bc3fe3226f0.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6917/files/tutorial_de_ableton_live_9_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0802/files/guia_ilustrada_de_la_avifauna_colombiana.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5494/files/83836230001.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_off00004267.bin
7b3b0a8755424a1f91b42b07d3482b93841b00c7cd3c4b35e9eb79e87165caa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4267 5048 bytes
font_01_sfnt_off000053a7.bin
4d8fdf93f62b690706fcb152ae65d0852acb146c424f35a84305bdb1aef48f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A7 10036 bytes

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