Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2f74fc9b466fb1…

MALICIOUS

PDF

70.2 KB Created: 2020-10-30 06:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84baccf99429105b36dada4a51042825 SHA-1: 2cdcdda61c073e85cabbee5202fae7ee15ffea0c SHA-256: 7f2f74fc9b466fb1baf7136aea97bf2e61e5e5dd62e1062b1673a3c5329daf10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a movie subtitle, and the URL itself includes a keyword related to a movie. The presence of numerous external PDF links also suggests a link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/123?keyword=the+valdemar+legacy+ii+the+forbidden+shadow+english+subtitle
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8a82d894ff2.pdf
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5f9b658d71483.pdf
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f8a75be8e634.pdf
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5f986e8847337.pdf
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f95107d3e19a.pdf
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/b58870f6cb.pdf
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f98c1925f1bc.pdf
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/wirurap_rogis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tejuvonixag/pupumep.pdf
    • https://s3.amazonaws.com/memul/rinedujedowomebape.pdf
    • https://s3.amazonaws.com/loneminovu/kabirogurarebom.pdf
    • https://cdn.shopify.com/s/files/1/0507/8250/3070/files/fifa_point_generator_no_survey.pdf
    • https://s3.amazonaws.com/dedinavesute/los_actos_del_hombre.pdf
    • https://s3.amazonaws.com/jakujakula/agreement_in_spanish_means.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34f.bin
8461746aa15880ee622acec73aceb3e3cba0e9801609051687d71b335d625187
pdf-font-stream PDF embedded font (sfnt) at offset 0xD34F 5780 bytes
font_01_sfnt_off0000e6ed.bin
3ce32d71cc4d3ecf4edcf6aaa78216b92118b762f6d42387420285ab53dd3014
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 10708 bytes