Malicious PDF — malware analysis report

Static analysis result for SHA-256 753ecc9f84109fff…

MALICIOUS

PDF

59.5 KB Created: 2020-08-29 17:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11843840ac8d8ca43eaece9b41f13d8f SHA-1: ef69d4d92e32eac28177a924a7a21afdb3d3dd4c SHA-256: 753ecc9f84109fffdbf5e01e44d0fe28889a21319e74df6529598e1221b49f1e
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL, https://ttraff.com/wix?keyword=carlos+manuel+madero+cantu, is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/wix?keyword=carlos+manuel+madero+cantu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a155b6eb5a8b452d9c3f7b4c32c861d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_778fabad083c45bcac7329df819bf7d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbb6a38463be41ffaa6cf2362d6daef8.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d36f160296b48f5a4eb1185357e8ee0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://static.usrfiles.com/ugd/b8c837_84d00b0aba554ca59aefe89adaa1aa86.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b08894991047e582f1b28c977478ce.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7495/files/convert_unix_timestamp_to_date_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0463/7409/2961/files/xokadepuwozetutonaxu.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_off0000a18e.bin
645a881f7f57bcfd9b5f9c6b28404db39e1a82ae7448c977cc7a3cd51ca3211b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA18E 4992 bytes
font_01_sfnt_off0000b269.bin
0f5f70d4719486a4f1c9159ebd07ff03d9d195ee305b7712668321ccacc7032e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB269 15236 bytes

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