Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a75a03be0dfefe…

MALICIOUS

PDF

42.3 KB Created: 2020-08-17 02:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 071d187498342a632ecef6b3504944aa SHA-1: 987e6d4ee4b520532d51c5d9ca43bb57ed8cc7c7 SHA-256: 25a75a03be0dfefead90df193be39adab2c08d0c1575c8422a0d21e5dbaa40a7
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=antergos+i686+iso, which is a known malicious redirector. The document body contains numerous embedded URLs, many pointing to Shopify, but the presence of the redirector indicates a malicious intent to lead users to harmful 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.cc/pify?keyword=antergos+i686+iso
    • http://files.stevestutz.com/uploads/1/3/1/8/131871586/563f078e90e8.pdf
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/78799726553.pdf
    • https://cdn.shopify.com/s/files/1/0440/4301/0198/files/thumbnail_size_youtube.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/foxit_reader_download_old_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/types_of_lexical_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0167/files/bajrang_bali_dj_song_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0443/8438/7238/files/new_headway_beginner_test_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/jarofisumuvawodogafedug.pdf
    • https://cdn.shopify.com/s/files/1/0433/5543/9263/files/22335274234.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/astronomy_and_astrophysics_journal.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/74168705770.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ab6.bin
718e3fe4c3fa60e701e622314c52cc65ff892176524c19671d74c9d74eac4212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB6 4736 bytes
font_01_sfnt_off00006ad3.bin
0dedc5a9dd87c69a015c28e46975b9eb097d9d0510e6cf5394098999223bdebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD3 10556 bytes
font_02_sfnt_off00008ee4.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE4 4324 bytes

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