Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04480c09c314cd2…

MALICIOUS

PDF

36.8 KB Created: 2020-08-31 17:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6395c520a4b16a0b59142bd487a50e6f SHA-1: 5ddc4343569af304cf2223ba44fe9e6cb77a44c4 SHA-256: d04480c09c314cd2d97245c737c83ceb8f8430c8e313eb26d82390837bef3f17
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a 'phonics worksheet' and includes the URL 'https://ttraff.com/wix?keyword=phonics+worksheet+phase+3', which is flagged as malicious. This suggests a social engineering attack aiming to redirect users to malicious content under the guise of educational material.

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.com/wix?keyword=phonics+worksheet+phase+3
    • https://cdn.shopify.com/s/files/1/0431/6571/2541/files/36526979915.pdf
    • https://cdn.shopify.com/s/files/1/0440/7584/3736/files/arya_movie_audio_songs.pdf
    • https://cdn.shopify.com/s/files/1/0440/1568/1701/files/cbse_english_grammar_book_for_class_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/26086518929.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7897/files/zepifivolusamixuleturige.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f497ba781d34cb5a5cacf40d1b91d67.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f92c65d7a024e6a8718f26566f71acb.pdf
    • https://static.usrfiles.com/ugd/15d534_4ebd26c650bc484183efcaa7e4a0c645.pdf
    • https://static.usrfiles.com/ugd/3b7182_5bfe9dd4f9154eecbb217c3310fbba3e.pdf
    • https://static.usrfiles.com/ugd/a18aa6_e2b35bde1b3f4b1da7eb26ab5460c864.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/ineval_ser_bachiller_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6781/files/n_d_p_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/academic_search_engines.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/71096836788.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/design_and_analysis_of_algorithms_notes.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_off000052ec.bin
a72ff0b3f79b47e9959c1ffbb9da278517dd2f1264b82f6d11743e748fb287e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52EC 5308 bytes
font_01_sfnt_off00006509.bin
9631c97f7548f8b4fe07be9be8f2891088c1559ab474a24df453ffcbade6722f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6509 9852 bytes

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