Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebc0433cef641fe…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 15:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb67a604c37c9bfe4813e1c81a84cb3a SHA-1: 7f6dd60c7e361ca87add54b17ae92212132d5882 SHA-256: 0ebc0433cef641fe559f382ded9da39d01b4bb3666340eb51d1bbba7ef5fa4bb
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One of these links, https://ttraff.cc/wix?keyword=que+es+un+lider+segun+autores, is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the PDF's nature and the malicious URL indicate a high likelihood of a phishing or redirection attack.

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.cc/wix?keyword=que+es+un+lider+segun+autores
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_7295b7dca1ec4c1ea5e646ec88bd6e5a.pdf
    • https://static.usrfiles.com/ugd/5b604d_cc0ca785751646978f3b7ef7fa3ebde4.pdf
    • https://static.usrfiles.com/ugd/8d57bd_a9fd65d350694a16b6cfd6bc34acb11f.pdf
    • https://static.usrfiles.com/ugd/277b62_58919e32b4ca4abbabd35e63b77a3613.pdf
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/lead_sheet_music_creator.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/maya_student_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/targeted_malicious_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/wanegoxifimagidobomudas.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8ae1cc5048e42cca5aca5c01c483612.pdf
    • https://static.usrfiles.com/ugd/b8c837_25bc10c4aeab49bfb623038ca7ad96a6.pdf
    • https://static.usrfiles.com/ugd/b80405_2c2be314dedf42e9b0cccdc115971070.pdf
    • https://static.usrfiles.com/ugd/b8c837_b03a392f0c864f339b26f3c3b6d0a86f.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_off000061d1.bin
ad4d3b5bb4a421d318907c7d16bd02b83cec7c28155d73434c8872e93fe882d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 5056 bytes
font_01_sfnt_off00007309.bin
e36105c4b4a9994507c18b931dba09dc3cfb8d02b15669e0e501ce8ec4fe8a52
pdf-font-stream PDF embedded font (sfnt) at offset 0x7309 11456 bytes