Malicious PDF — malware analysis report

Static analysis result for SHA-256 27319b1d2d89e14b…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 13:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3e9e8d7058533aee0ebec1ccc0f4655 SHA-1: f56c473fba19facd51708254824d27a3efa406bd SHA-256: 27319b1d2d89e14be95b7047d7a386b9beca646b3acd7085bb08716d42e49aad
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=rf+power+amplifier+design+book+pdf'. This indicates the document is designed to redirect users to malicious sites under the guise of providing a technical book.

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=rf+power+amplifier+design+book+pdf
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdf
    • http://files.maggiegyoga.com/uploads/1/3/2/6/132682820/xabosakisem.pdf
    • http://ripok.cubbingtonandleekwootton.net/uploads/1/3/1/4/131437736/bofej_ganubisotuzoke.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0803/files/lasepajilip.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/xotomumotaxugozemeliroz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/48267348490.pdf
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/html_to_free_online_converter_aspx.pdf
    • https://cdn.shopify.com/s/files/1/0432/7781/1867/files/tb_meningitis_complications.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/91056524240.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/puxokak.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7206/files/pokemon_black_and_white_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0437/3548/2517/files/chemistry_matter_and_change_teacher_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/indefinite_pronouns_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/2713/5640/files/wugenazarikupeni.pdf
    • https://cdn.shopify.com/s/files/1/0450/1300/8534/files/impulse_control_activities.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_off00006a82.bin
a81b7d39a384982195c050ca659c7ddcb7aee9cc1654c7d7e0bbd5b17737bf2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A82 5664 bytes
font_01_sfnt_off00007dc9.bin
bdf15f2c51113aabf231dd929a4cb03839b53b87496cbbd7849fb8fbb59ae551
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC9 9936 bytes