Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccfa23434539fff…

MALICIOUS

PDF

46.9 KB Created: 2020-10-08 11:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 57180ce4fe04d33f87171766071e3025 SHA-1: f7ab03149764d503ef0d41509a20f1b361f763a0 SHA-256: 7ccfa23434539fffe784c232c5708e4cc614bc159adaf5a59bddb87ad881bb31
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/pify?keyword=merry+merry+christmas+nkotb'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link indicate an attempt to lure the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/pify?keyword=merry+merry+christmas+nkotb In PDF document text
    • https://site-1043248.mozfiles.com/files/1043248/64470975080.pdfIn PDF document text
    • https://site-1042672.mozfiles.com/files/1042672/58694824682.pdfIn PDF document text
    • https://site-1044026.mozfiles.com/files/1044026/96802139290.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/24535fbd-63c6-4af4-8eef-5a0f397dad44/16638748607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e61d72-b8ba-4443-bf53-29edb7e505a9/18004162259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0edb771e-ff33-4cfb-a95b-93d254540227/46882735277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130dfd83-e1f2-463a-aa6d-6de203b26387/subux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a267dd95-22b8-494d-8c27-95db5c0d8b26/mezoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b06d00d-1f5d-43cd-93de-88163d6a7425/ligemukedeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194a186a-0416-44d3-a739-34f5fcd5176a/28007422491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbe25802-4dbc-4936-b69a-594ae8961a16/kubazidaxuguzabalixanum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6057 5316 bytes
SHA-256: f74b1e42e1945241efdb0819880c1be4d33504444e597cf5a1c1cd58fa70d282
font_01_sfnt_off0000724e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724E 2132 bytes
SHA-256: 97f4e321c4337394321b9d74f16a77a62b54c40bc612b2b21f5eba016a7c0d4e
font_02_sfnt_off00007c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C09 15852 bytes
SHA-256: c3d484e19cee08518bf5b5662c9d7a5193806601c2402ef9e5b2c767da4b6d5d

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