Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26124d1589945d3…

MALICIOUS

PDF

40.6 KB Created: 2020-10-09 01:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec179a4638dc9f3db08ec59996e55bc5 SHA-1: dde9feac403bb050259f86ad58ab1cf74fac818d SHA-256: b26124d1589945d3d5d1e7d4c9b0782fc86f108e0955b66eb77e44a3d9cd11cd
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/pify?keyword=bozak+horde+trophy+guide'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/pify?keyword=bozak+horde+trophy+guide
    • https://site-1041068.mozfiles.com/files/1041068/14680415676.pdf
    • https://site-1039800.mozfiles.com/files/1039800/jojiwusasezas.pdf
    • https://site-1036698.mozfiles.com/files/1036698/vodajarisibakukujokad.pdf
    • https://site-1038489.mozfiles.com/files/1038489/54992336058.pdf
    • https://site-1036754.mozfiles.com/files/1036754/12587379458.pdf
    • https://site-1037022.mozfiles.com/files/1037022/vuwovavixepuram.pdf
    • https://site-1039303.mozfiles.com/files/1039303/bisidefokokideluvoza.pdf
    • https://site-1038382.mozfiles.com/files/1038382/53880347340.pdf
    • https://site-1043941.mozfiles.com/files/1043941/97165154466.pdf
    • https://site-1040434.mozfiles.com/files/1040434/fusubevonojanogopeg.pdf
    • https://site-1038575.mozfiles.com/files/1038575/zivosetogipemume.pdf
    • https://site-1036926.mozfiles.com/files/1036926/29406306900.pdf
    • https://site-1040777.mozfiles.com/files/1040777/39379534836.pdf
    • https://site-1048567.mozfiles.com/files/1048567/52476648528.pdf
    • https://site-1036883.mozfiles.com/files/1036883/vezanofavifupupezigekuti.pdf
    • https://site-1042023.mozfiles.com/files/1042023/28930090459.pdf
    • https://site-1036667.mozfiles.com/files/1036667/naliwelos.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_off00006100.bin
134866709b42e528f13befac31dd8f5b2f8dd7d23a71562ffd6d844636ea6f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 5276 bytes
font_01_sfnt_off00007306.bin
201d77e2ff86eb49c2195a8458abe3ceba07bbab3a0c4b0cd9f06649019269aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 10032 bytes

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