Malicious PDF — malware analysis report

Static analysis result for SHA-256 5089326e64ae1c33…

MALICIOUS

PDF

42.1 KB Created: 2020-09-06 11:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00af141dfa5dcab166eb00b15e1d0a2e SHA-1: a6dd55f1604dfe0f8ad5a9de8fc69ba650ff208c SHA-256: 5089326e64ae1c33164102eaeb31b8a7d58ce6df15c62dc5eec90adb5d4bef53
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of external links. One of these links, 'https://ttraff.club/wix?keyword=simple+browser+android+github', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and other links to PDF files hosted on Shopify. This suggests a link farm or redirection attack designed to lead users to malicious content.

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=simple+browser+android+github
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/kosisetukufibino.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/rifajujarowavojakizunizut.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/vaaste_lyrics_full_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/25491333632.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/68700301516.pdf
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/63806729242.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/45334834217.pdf
    • https://static.usrfiles.com/ugd/23e9be_24a5b739546842ea9a3d426b90e33193.pdf
    • https://static.usrfiles.com/ugd/b148e5_1c22b9122467468c9ac1bdd7f4fda1ee.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/90307639992.pdf
    • https://cdn.shopify.com/s/files/1/0462/3692/6103/files/tuvizidukasagakugifiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0553/3604/files/96128003685.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/dabowime.pdf
    • https://cdn.shopify.com/s/files/1/0460/1197/3799/files/download_mp3_ost_zootopia_try_everything.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_off000064b1.bin
5f0e48e90d0e280a42210a41f8050642d3629361f416b97bf6c2d78d371ad3c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B1 5708 bytes
font_01_sfnt_off000077ee.bin
1d74352df45de3c730305d20be338fbb2bdd2d40059d81b7c6264293e1265222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EE 10456 bytes

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