Malicious PDF — malware analysis report

Static analysis result for SHA-256 541616172a88c575…

MALICIOUS

PDF

39.8 KB Created: 2020-09-15 22:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 78d7d5b152f6654ea1d60fac7bd6ea8d SHA-1: facdcac94365e284d2beb21292bd57f033ec511c SHA-256: 541616172a88c575bf9d0dd0244f5869702afe9d951ecb8c8e3866f30d14b86d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL identified is https://ttraff.club/pify?keyword=rot+and+ruin+tom+death. This behavior is indicative of a phishing or redirection campaign, likely delivered as a spearphishing attachment.

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.club/pify?keyword=rot+and+ruin+tom+death In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/822ecd_90899aa429084f77b9becb232c029b35.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_15e92f99d0184713afe8be59e0e5d453.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b49c6_a6ce2b2943c04009836eee28ebfeb64a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b914b5_767c38917b8e4e0c9c935b840cc77193.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/934fc3_cf6d4ae41b5d4bffb9721b308cb6d34c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cbe325_0e0febea54fc41acbad28bf53c342496.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5af86b_ffa2f7f6a73c46b8aaf86d6415debe42.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_854ccda3cc304d0586db2b2da9a270c3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/87a178_8392eb8d100d4f64a16c518906228d0c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2eedf1_097c351df340451cb9ca65bdbd5231aa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C5 4860 bytes
SHA-256: 31e0edddc58d7cdb13bfebf7e404a19424d18924a706e7afc0d0ce7c1379ea9f
font_01_sfnt_off00007120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7120 9932 bytes
SHA-256: affd4ecff076659ad37e715c434f58ac654fbffc06cf690401012d6bd253c36c

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