Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f00226fcb0bfb6c…

MALICIOUS

PDF

47.1 KB Created: 2020-07-08 11:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7841d882fed6d33263da20aa62b8feeb SHA-1: d0c0000f8b29adf21450566b61455cecfd9d3633 SHA-256: 5f00226fcb0bfb6c40ddf6d7e04f60de3b327e8df82a599e26ed2683c5a06775
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One primary URL, 'https://ttraff.ru/wb?keyword=strategic%20management%20books%20pdf%20download', is identified as a known malicious redirector. The document body, though partially obfuscated, also contains this URL and other PDF links, reinforcing the malicious redirection intent. The ML classifier strongly flagged this PDF as malicious.

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.ru/wb?keyword=strategic%20management%20books%20pdf%20download
    • http://files.trueembodiment.com/uploads/1/3/0/7/130740232/cd4a44fc20c3a4.pdf
    • http://files.lucianamagdalena.com/uploads/1/3/1/6/131606550/75f47b5d288d6.pdf
    • http://files.batonrougedumpsterrentalpros.com/uploads/1/3/1/8/131857818/gipewadadukozaj.pdf
    • http://files.harmonizeyourspace.com/uploads/1/3/2/3/132302913/6922088.pdf
    • http://files.joecoxwell.com/uploads/1/3/2/7/132710782/gobisopaj-selilizoj-tuvipasiwafi.pdf
    • http://files.writings.emanatepresence.com/uploads/1/3/1/3/131384573/72da883.pdf
    • http://files.rustyscupper.net/uploads/1/3/1/4/131437753/c859f35b22df88.pdf
    • http://files.edenrayna.com/uploads/1/3/1/6/131606550/fatajumazejato-pevopowij-tasukezupek-janebitufa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ginovak.files.wordpress.com/2020/07/83825333480.pdf
    • https://tesavip.files.wordpress.com/2020/07/redabefabutu.pdf
    • https://sewekomebugi.files.wordpress.com/2020/06/50323099743.pdf
    • https://zetirufim.files.wordpress.com/2020/07/70526661451.pdf
    • https://tusolesi.files.wordpress.com/2020/07/wawolupos.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_off000079ff.bin
b4ee7a3da6c3eace12bae5f9046311f4bb2fb90339d6e4fb12154d54874b43c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x79FF 5660 bytes
font_01_sfnt_off00008d31.bin
ab77bfc47a4894b71151e7e38c58dd4407436d793bec7128bbcf2172a9f79d54
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D31 10140 bytes