Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a32537d4460c38d…

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 20:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04d6df09f59942a03f33bc5839b744ee SHA-1: a067610390b2c76fce1a23da092eb383a27a06e7 SHA-256: 9a32537d4460c38d8e81d678130754b4c9fb60fdabe499c2a393fd06eae0338d
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=acid+base+balance+mcqs+pdf', which is flagged as malicious. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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.cc/wix?keyword=acid+base+balance+mcqs+pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/jujedofakiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/pegari.pdf
    • https://cdn.shopify.com/s/files/1/0429/5298/2684/files/91461101451.pdf
    • https://static.usrfiles.com/ugd/fb83f1_b89b8aa950a64c619e6374801913065f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/13255084920.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/beethoven_fur_elise_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/apprendre_l_anglais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0454/2755/6510/files/avengers_theme_sheet_music_orchestra.pdf
    • https://static.usrfiles.com/ugd/b8c837_54501e7fd0c8447d87c786dee27e2473.pdf
    • https://static.usrfiles.com/ugd/12f4eb_ad9d5fed84ca4a1d8d8bceef50b2b07c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6fa9a903a1f4da1a6b4070563175ce3.pdf
    • https://static.usrfiles.com/ugd/576447_1103fb2f3aa248a183d37375d61458e1.pdf
    • https://static.usrfiles.com/ugd/9219f8_c995cdc2adfb440d96462f835bc06ec3.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_off00005f66.bin
a03a342dcc4c831edfc22298f6ad29456416912670bdaec3db73374487aaa7ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 5460 bytes
font_01_sfnt_off000071d9.bin
e2bc265f861dc64695c0177eb1f87f3647aa149783fb7850c6a87d7bb3d6e557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D9 11296 bytes

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