Malicious PDF — malware analysis report

Static analysis result for SHA-256 350d977225e1178f…

MALICIOUS

PDF

41.2 KB Created: 2020-10-11 16:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 03e4dc10bd6ed93556c231aa6152059e SHA-1: 94c32dbe630ad110c02f0870af292f834b2dd807 SHA-256: 350d977225e1178f2f78266302b2a532086a1286b05be484c9731331b1dbba87
124 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious and contains numerous embedded links. One link, 'https://ttraff.club/pify?keyword=holy+priest+pvp+guide+skill+capped', is identified as a known malicious redirector. The document functions as a link farm, distributing links across many disposable hosting domains, which is a common technique for obscuring malicious destinations or distributing phishing lures.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=holy+priest+pvp+guide+skill+capped In PDF document text
    • https://site-1044026.mozfiles.com/files/1044026/719594400.pdfIn PDF document text
    • https://site-1044016.mozfiles.com/files/1044016/59826054034.pdfIn PDF document text
    • https://site-1042598.mozfiles.com/files/1042598/99191546682.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/72784023349.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/suxadodotifug.pdfIn PDF document text
    • https://site-1042264.mozfiles.com/files/1042264/23929287896.pdfIn PDF document text
    • https://site-1043606.mozfiles.com/files/1043606/51930396006.pdfIn PDF document text
    • https://site-1040987.mozfiles.com/files/1040987/1472028411.pdfIn PDF document text
    • http://files.poetsanddreamers.com/uploads/1/3/1/8/131871909/602868428c7560.pdfIn PDF document text
    • http://siwuve.thordonaustralia.com.au/uploads/1/3/0/9/130969335/gokimokin.pdfIn PDF document text
    • http://files.holl-lab.com/uploads/1/3/0/9/130969420/9366017.pdfIn PDF document text
    • http://files.skincarebydaniela.com/uploads/1/3/2/6/132682441/woxupegaru.pdfIn PDF document text
    • http://files.lightofchristgarden.org/uploads/1/3/1/4/131408008/nikatizav-sunulotu-tewewopesuti-rapaxukorut.pdfIn PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/zobekad.pdfIn PDF document text
    • https://site-1043033.mozfiles.com/files/1043033/xuzibiwitepufivuma.pdfIn PDF document text
    • https://site-1037899.mozfiles.com/files/1037899/fejewasinesavujamirafevi.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/37082995970.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/mexixifaguzel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000607e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607E 5428 bytes
SHA-256: c3c9b72ce72c1069a707b24711bcd337ab871ce536e7d854e00a1a1aa15756c8
font_01_sfnt_off0000730c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730C 10764 bytes
SHA-256: f882cbce70178b3069fabec98f6a206ecda61900f41736c51a74a6f9225569b9

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